• Courtney Ellis is a 42-year-old mom of three in Mission Viejo, California.
• She found a used train set online and agreed to buy a quarter of the set.
• When she went to collect the set, the seller gave her the entire set for no extra cost.

This as-told-to essay is based on a conversation with Courtney Ellis, author of Looking Up. It has been edited for length and clarity.

Ten years ago, my husband and I moved with our 2-year-old son from Wisconsin to California to work at a church. My husband was finishing a Ph.D., and our only source of income was a pastoral position at the church, which we split between the two of us.

We were eating through our savings just to make ends meet, living in a tiny condo, and hoping that in time, we'd both be able to take on more hours at the church.

Our first Christmas in California, I wanted to make our son's Christmas special despite the stress of money and budgeting. Retrospectively, I can now see he would have been just as happy with a cardboard box, but at the time, as his mom, I wanted to be able to give him the world.

I couldn't afford the train set

I'd recently found a train table at a garage sale for $5. Whoever had it previously had colored all over it with crayons, hence the price.

Knowing I needed trains to accompany the table, I looked online and found a beautiful Thomas the Tank Engine set just a mile away. It had all the character trains and accessories. When I saw the price, I knew I couldn't afford the full set, so I asked the seller if I could just buy a quarter of it. I knew she might say no — that she might want to sell it as a package — but I asked, and she agreed.

She asked what part of the set I wanted, and I requested enough tracks to make a circle and a few trains.

I was completely thrilled that we would be able to give him a gift I knew he would love on Christmas morning.

When my son fell asleep, I left him with my husband, and I drove my 20-year-old car a mile to get the train set, expecting I might arrive at a huge house. But I arrived at a small condo, much like my own. I assumed she was probably selling this train track to pay for her own kids' Christmas presents.

When she opened the door, she held out a clear Ziploc bag of train tracks and trains. I thanked her and explained that we had just moved to the area. I was so thankful she was willing to sell me just a portion of the track — it was exactly what I had been looking for.

She gave me the entire train set

In that moment, we connected as frazzled, busy moms.

I got out the money to pay her, and she told me to wait, leaving me waiting at the front door with my money and train set in hand. I thought maybe she had forgotten one of the pieces.

She came back with three more bags of train sets. I was afraid there was a misunderstanding but I didn't want to say that I couldn't afford the rest of the set.

"Oh, I think we had just agreed on the one part of the set," I told her.

"I know," she responded. "Merry Christmas."

She handed me the bags, took my money, and closed the door behind her, leaving me on the front steps, trying to compose myself after experiencing such unexpected kindness.

I still cry thinking about that moment

I still tear up thinking about that moment. We were so financially strapped and really stressed about our budget, and she treated me with tenderness. It was life-changing, in a small way, and has stayed with me all these years later.

Recently, one of my sons told me a neighbor boy really liked these big trucks we have.

"I think I'm ready to say goodbye to my big trucks," he told me. "Can we take them over to the neighbor's house?"

Maybe at one time, I would have thought I could have gotten money for the trucks, but then I think back to how that woman gave me that extra train track. Since then, we have always tried to give as we have been given to, to pass on the gift of generosity, even in small ways. We decided to give as we have been given.

When I wrote about the train tracks on Threads, so many people commented about their own personal experiences of kindness. When we perform acts of generosity or share about how someone has been generous to us, I think it helps us and others begin to develop eyes to look for all the light around us in the middle of what can feel like darkness.

• The US Navy wasted almost $2 billion on a failed effort to upgrade its cruisers, a watchdog report found.
• Four Ticonderoga-class vessels in the program were decommissioned before refits were completed.
• The report said schedule delays, poor planning, and quality oversight led to wasted funds.

The US Navy wasted nearly $2 billion on a failed effort to overhaul its aging cruiser fleet, a government watchdog investigation found.

After Congress rejected the Navy's 2012 proposal to retire its Ticonderoga-class cruisers, it provided funding for a 15-year ship modernization program. Since 2015, the Navy has spent roughly $3.7 billion of those funds trying to modernize seven cruisers.

But poor planning and oversight forced the sea service to decommission four of the seven cruisers mid-service, according to the Government Accountability Office. It said in a new report that "the Navy wasted $1.84 billion modernizing four cruisers that have now been divested prior to deploying."

The deactivated warships were then cannibalized for parts for the remaining cruisers in the modernization program.

Problems figuring out the future fleet

The Navy's Ticonderoga-class cruisers were the first warships to be equipped with the Aegis Combat System, an automated weapon control system designed to detect, track, and engage aerial, surface, and subsurface threats.

These warships were equipped with 122 vertical missile launchers capable of launching Tomahawk and Harpoon missiles, among other weapons, forward and aft deck guns, and two close-in weapons systems.

In 2001, the Navy started work on a new cruiser as it prepared to phase out the Ticonderoga fleet. Nine years later, it abandoned the next-generation program and instead procured upgraded versions of the Arleigh Burke-class destroyers to fill the gap before the arrival of future destroyers.

New destroyers are still being developed after the failure of the Zumwalt program and delays with the DDG(X) program.

Billions of dollars in waste

Worried about China, some lawmakers resisted the Navy's initial proposal to decommission the ships faster than it could replace them, so the modernization program was implemented instead.

The overhaul aimed to modernize the ships' aging infrastructure by replacing corroded and worn hull components, upgrading mechanical and electrical systems, and integrating more advanced sensor and radar systems. It was also designed to make the warships compatible with more advanced missile defense systems and next-generation missiles.

USS Hué City

During its over three decades of service, the cruiser USS Hué City provided humanitarian aid off the coast of New York in the wake of the 9/11 terror attacks and embarked on seven deployments in support of US operations in Afghanistan and other areas in the Middle East.

Despite allocating $161.15 million to upgrade the cruiser after entering the modernization program in 2018, the Navy decided to decommission the Hué City in 2022, before work even started.

USS Anzio

The Anzio was decommissioned along the Hué City in 2022 after 30 years of service. The cruiser participated in operations in the Mediterranean Sea, Indian Ocean, and Black Sea. The Anzio's crew also disrupted pirate activity in the Red Sea and Arabian Sea and fired over a dozen Tomahawk missiles in support of Operation Iraqi Freedom while stationed in the Persian Gulf.

The service spent $250.54 million to upgrade the Anzio but later discontinued work on the ship due to cost overruns.

USS Cowpens

The Cowpens is known for Tomahawk missile action. In 1993, the Cowpens fired 10 Tomahawks into Iraq after violating no-fly zone sanctions. A decade later, the Cowpens launched the first Tomahawk missile into Iraq at the start of Operation Iraqi Freedom.

The Navy invested $678.56 million to upgrade the Cowpens, but service officials inadequately managed the ship's maintenance and upgrades. Properly repairing and modernizing the vessel would have cost another $88 million. The Cowpens was decommissioned in August after 33 years of service.

USS Vicksburg

The Navy decommissioned USS Vicksburg at the end of June after 32 years in the fleet. It was the first ship to undergo modernization in 2016.

The Navy spent $745.05 million to upgrade the ship, but after the cruiser spent four years in the shipyard, the Navy found that the work was only 85% complete. Contractors dropped the ball on quality control while the Navy let maintenance slip to the point that key systems on the ship were simply not salvageable.

In September 2023, Navy officials found that the Vicksburg was still "years away" from completing its modernization, which would have cost another $120 million to finish.

Overhaul shortfall

Only three ships are expected to complete the modernization program — USS Gettysburg, USS Chosin, and USS Cape St. George. The cruisers will serve until fiscal year 2030 due to a service-life extension that the Navy announced in November.

The Gettysburg was the first of the three vessels to complete its modernization in February 2023. Less than a year later, a Navy review identified defects in the ship's weapon systems and several structural issues. It wasn't until this past summer that the warship passed a missile launch test using its updated combat systems.

In September, the cruiser deployed to the Middle East with the Harry S. Truman Carrier Strike Group to help defend against Houthi attacks in the Red Sea.

USS Chosin completed its modernization in early 2024 after its nonfunctioning ventilation caused problems with the Aegis' computer equipment, delaying operational testing before it was redelivered to the Navy.

The Chosin was involved in the Navy's first successful attempt to reload a warship at sea. The Transferrable Reload At-sea Mechanism uses an apparatus of cables, rails, and pulleys to transfer missile canisters directly to a cruiser's vertical missile launchers, streamlining the reloading process at sea rather than traveling to the nearest port.

Commissioned in 1993, the Cape St. George is the youngest active Ticonderoga-class vessel. The cruiser is still undergoing modernization and slated to undergo sea trials next year. The Navy plans to deploy the cruiser at least once before decommissioning.

A temporary fix

The Navy's failed efforts to modernize its Ticonderogas highlighted the need to address flaws in the service's approach to maintaining a combat-ready fleet.

"The Navy did not effectively plan the cruiser effort," the GAO report said, adding that "this led to a high volume of unplanned work — 9,000 contract changes — resulting in cost growth and schedule delays."

The watchdog report said the Navy "has yet to identify the root causes of unplanned work or develop and codify root cause mitigation strategies to prevent poor planning from similarly affecting future surface ship modernization efforts."

The GAO report released earlier this week spotlighted the flaws in the Navy's modernization efforts for its cruisers. The new report followed the Navy's recently announced $10 billion effort to refurbish its older Arleigh Burke-class destroyers "to keep more ready players on the field" while it works on other shipbuilding projects, like newer Burkes and the Constellation-class frigates.

• Multiple prohibited items were found in a woman's bag at Los Angeles International Airport, per the TSA.
• A TSA officer flagged the bag after spotting the items in an X-ray image.
• Jason Pantages, LAX TSA Federal Security Director, said the incident was "extremely concerning."

The Transportation Security Administration (TSA) said one of its officers found fireworks, knives, and other prohibited items in a woman's carry-on bag as she attempted to catch a flight at Los Angeles International Airport earlier this month.

In a recent press release, the TSA said one of its officers flagged the bag after spotting the items in an X-ray image.

"When the bag was opened with the passenger present, the TSA officer was shocked at its contents," the TSA said.

The bag, which belonged to a female passenger set to travel to Philadelphia, contained 82 consumer-grade fireworks, three knives, two replica firearms, and one canister of pepper spray, it added.

The incident occurred at LAX's Terminal 4 at around 10 p.m. local time on December 15.

The TSA said it informed the Los Angeles World Airport (LAWA) police department and that officers went to the security checkpoint and interrogated the traveler while a bomb squad confiscated the fireworks.

Jason Pantages, LAX TSA Federal Security Director, described the find as "extremely concerning."

"This traveler should have followed TSA's tried and true advice - unpack your bag before you pack it to ensure you don't bring any prohibited items to the security checkpoint," he said. "We are in the midst of the holiday travel season when security checkpoints will be busy everywhere."

The TSA reminded travelers that fireworks are not allowed on board an aircraft in carry-on or checked luggage and that knives and replica firearms should travel in checked baggage.

It also said that one four-ounce container of pepper spray is permitted in checked luggage as long as it has a safety mechanism to avoid "accidental discharge."

It comes as airports across the US brace for a busy festive season.

More than 3.2 million people are expected to pass through Los Angeles International Airport during the holidays, the Los Angeles Times reported.

The TSA, meanwhile, said it expected to screen nearly 40 million people from December 19 to January 2, up 6.2% from last year. It forecasts the busiest days as December 20, 27, and 30.

TSA and LAWA didn't immediately respond to requests for comments made outside working hours.

• Y Combinator group partner Jared Friedman last year switched to using robotaxis exclusively.
• Friedman told Business Insider that he estimated spending 4% of his waking hours in a Waymo in 2024.
• Friedman was also an early angel investor in Cruise, which was acquired by GM in 2016.

Angel investor and Y Combinator group partner Jared Friedman spends a lot of time in a Waymo.

To be more exact, Friedman told Business Insider in a recent interview that he estimated spending about 4% of his waking hours this past year in a Waymo robotaxi, getting to and from his home and office in San Francisco.

"For me, the great thing about self-driving cars is you can really work out of them," he said. "So I just get into the Waymo, I tether my laptop to my phone, and it's basically like my office on wheels."

According to his stats from the Waymo app, which Friedman shared in a post on X, the angel investor has spent 12,536 minutes inside a Waymo, traveling 2,105 miles for a total of 517 trips in 2024.

"Hit 2,000 miles in Waymo last year," he wrote in the post. "Hard to imagine life without it at this point."

A spokesperson for Waymo confirmed to Business Insider that Friedman is in the top 1% of Waymo riders.

Friedman's enthusiasm for self-driving cars may not come as a surprise.

He was an early angel investor in Cruise, the robotaxi company founded in 2013 and acquired by General Motors three years later. Friedman said he knew Cruise cofounder Kyle Vogt back when Vogt was working on Justin.tv, which eventually became Twitch.

Vogt, who stepped down as Cruise's chief executive in 2023, recently criticized GM after the automaker announced that it was pulling back its investment in Cruise.

"In case it was unclear before, it is clear now: GM are a bunch of dummies," he wrote on X.

Friedman recalled one of his first rides in a Cruise from more than 10 years ago and reveled in the progress self-driving technology has made since then.

"I remember getting to do a very early ride in a Cruise car when it was still just driving around in parking lots, and it was very jerky and kind of terrifying — very far from where we are now," he said. "But even at that time, there were some bold people who believed that this would be possible and 10 years and $10 billion later, it is."

Last August, Friedman said on X that he would exclusively get around San Francisco via self-driving cars since Cruise and Waymo at the time were more available to the public.

Cruise paused its robotaxi services in October 2023, shortly after California regulators suspended the company's permit to operate in the state due to several safety incidents.

Friedman said he took his first Waymo ride around the summer of last year. While he believes anyone can work in an Uber, Friedman said the Waymo experience is much smoother. He said he hasn't dealt with safety issues in any of his rides with a Waymo.

"You can do that in an Uber, but the Uber drivers are often quite aggressive," he said. "The Waymos are just very smooth drivers. You can really just focus. I think this has the potential to change the way people live and work."

Few technological innovations in his lifetime have instantly given Friedman that impression.

"One of them was the first time I picked up an iPhone," he said. "One of them was when I first used ChatGPT. And one of them was my first ride in a self-driving car."

"It was just absolutely obvious — instantly — that the world would never be the same," he said.

• The Big Four firms reported revenue growth in 2024 but consulting lagged behind other services.
• The firms reported more growth in tax and legal services while demand for consulting has slowed.
• PwC cited market factors and political uncertainty as reasons for slower growth in consulting.

The Big Four professional services firms — PwC, Deloitte, EY, and KPMG — all reported revenue growth this year, but growth in their consulting arms lagged compared to their other services.

After experiencing a boom during the pandemic, the consulting industry has faced economic headwinds and slowing demand over the past couple years. Major firms have conducted layoffs, delayed start dates, and cut partner pay.

Financial reports released by the Big Four professional services firms throughout the year showed their consulting arms grew slightly, but by less than their legal, tax, and assurance businesses.

In its financial report released in October, PwC cited a number of factors contributing to the slower growth in consulting.

"A continuing slow market for mergers and acquisitions, sluggish economic growth in a number of key markets and political uncertainty holding back investment in some key projects meant that the growth of our advisory operations slowed over the last twelve months," the report said.

KPMG, which was the last Big Four firm to report its 2024 financials this month, reported the highest overall revenue growth at 5.1% year-over-year.

Here's a breakdown of how the Big Four firms performed this year.

Deloitte

• Fiscal year end: May 2024
• Global revenue: $67.2 billionaire n
• Revenue growth, year-over-year: 3.1%

• Revenue growth by category:

  • Tax and legal: 8.7%
  • Audit and assurance: 4.1%
  • Consulting: 1.9%
  • Financial advisory: - 3.8%
  • Risk advisory: 3.2%

PwC

• Fiscal year end: June 2024
• Global revenue: $55.4 billion
• Revenue growth, year-over-year: 3.7%

• Revenue growth by category:

  • Tax and legal: 6.3%
  • Assurance: 3.4%
  • Advisory: 2.6%

EY

• Fiscal year end: June 2024
• Global revenue: $51.2 billion
• Revenue growth, year-over-year: 3.9%

• Revenue growth by category:

  • Assurance: 6.3%
  • Tax: 6.3%
  • Strategy and transactions: 2.3%
  • Consulting: 0.1%

KPMG

• Fiscal year end: September 2024
• Global revenue: $38.4 billion
• Revenue growth, year-over-year: 5.1%

• Revenue growth by category:

  • Tax and legal: 9.6%
  • Audit: 6.2%
  • Advisory: 2%

Have a news tip or a story to share? Do you work in consulting? Contact this reporter at [email protected].

• In 2005, my husband and I decided to throw a white elephant party.
• We've kept the tradition and are celebrating our 20th white elephant party this year.
• I think planning ahead is the one big secret to hosting a party.

In December 2005, the second Christmas my husband and I were married, we thought it'd be fun to have a few friends over for a white elephant party. The idea was a classic one, and the ambiance was as simple as you'd expect for a pair of 22-year-old newlywed hosts.

About a dozen of our friends gathered at our condo for an exchange of ridiculous presents, a pan of boxed-mix brownies, and a few two liters of soda (complete with requisite red Solo cups).

We all ended up laughing so hard over gifts that the next year, we decided to do it again, and then again, and then again. This December marks our 20^th white elephant party.

We gather with 50 people

What began as a handful of new college grads "adulting" has evolved into a 50-person dinner event people tell us they look forward to all year long. Though we've classed things up with a fancy menu and a bigger, more tastefully decorated house, our gifting rule remains the same: bring the worst, funniest gift you can find. I've had this year's gift picked out for months, and no I'm not telling what it is.

Putting on such a large holiday gathering for two decades has taught me a few things about gracious hosting. My goal every year is to create a white elephant party that's fun and memorable — but doesn't take over my entire December. Though I still get a bit tense on the day of the event, I always end the evening feeling like my emotional cup is full. Here are some of my top tips for lower-stress holiday entertaining.

I always plan ahead

It's a dead horse to beat, but I'm convinced planning ahead is the key to successful entertaining. If you want to host a party during the holiday season, set a date early and let invitees know. I mail paper invitations sometime in mid-November for a mid-to-late December party.

Planning is also critical for details like food and party activities. Outline a menu a few weeks in advance or pin down a caterer who'll do it for you. Then, use the weeks leading up to a party to make and freeze food or give potluck assignments. I also feel some kind of planned activity always enhances a party. Eating and chit-chatting are all well and good, but group games or giving silly gifts make an event truly distinctive.

I don't try to do it all myself

I'm a nutritionist and, admittedly, a bit of a perfectionist. In other words, it's tough for me to hand over the cooking reins to others. But I find I'm far less stressed when I don't do it all myself. My secret to feeding 50 people is a combination of homemade and purchased items. I'll snag a catered tray of Middle Eastern or Italian fare from a local restaurant, then supplement it with complementary homemade sides and desserts.

I love mixing groups of friends

Worried that folks won't get along because of their politics or personalities? That's OK. Your friends are grown-ups. Trust them to be civil to each other. And this year in particular, don't be afraid to make a statement at the start of a party to the effect of "no politics tonight."

I've personally witnessed that bringing different types together in a social setting often helps people humanize those "on the other side." Friends from different corners of my life have become real friends due to our annual white elephant. Make your home a space for people to come together to have fun despite their differences. Everyone will be better for it.

I enjoy what I've created

My favorite thing about our 20 years of white elephant parties isn't the decadent cheesecake I always make or even the hilarious-to-the-point-of-legend gifts.

It's knowing that my husband and I have created memories of fun and friendship for the ones we love. Our party is the Christmas gift I give to our friends every year.

It delights me every bit as much as I hope it delights them. In your own holiday entertaining, take a moment to appreciate the beauty of bringing people together to celebrate the season. I promise it's worth it.

• US Navy submarines are key to countering China's naval expansion in the Indo-Pacific.
• China's military expansion includes a large navy, posing a threat to US naval dominance.
• US submarines, despite challenges, maintain an edge with advanced capabilities and strategic roles.

The threat of a conflict with China has risen tremendously over the years. Beijing is undergoing some of the largest military expansion and modernization efforts since World War II, building a formidable arsenal of missiles able to threaten surface ships and massive naval force, but the US Navy still has the means to sink Beijing's dreams of supremacy in the Indo-Pacific.

The US is looking to solutions like anti-ship missiles, but a key answer to China's expanding surface and logistics fleet that could number over 700 ships in a conflict is submarines.

Hunt and Sink

The US Navy would play a leading role in a potential conflict with China in the Indo-Pacific. This region's vast maritime domain is ideal for naval and air operations.

China understands that, and Beijing has been investing heavily in its navy, the largest in the world according to the Pentagon. China has built three aircraft carriers with plans for more, possibly nuclear-capable flattops, new amphibious assault ships, and increasingly capable destroyers.

Where there are surface warships, there is an opportunity for submarines, and undersea capabilities are an area where the US maintains a clear edge over China, even as it strengthens its force and invests in anti-submarine warfare solutions.

An important role for the US submarine force in a conflict would be to hunt and sink Chinese warships and logistical vessels. Sailing routes around Taiwan and in the South China Sea would potentially be ideal hunting grounds for stealthy submarines like those operated by the US Navy.

In a war game conducted last year by the Center for Strategic and International Studies simulating an intense fight over Taiwan, the think tank found that "submarines were able to enter the Chinese defensive zone and wreak havoc with the Chinese fleet," but it also found the number of subs available was insufficient, indicating a need to prioritize these capabilities.

Attack submarines can be deadly for enemy shipping and change the course of a war. The Falklands War between Argentina and the United Kingdom in 1982 is a perfect recent example of the potential of submarines in a state-on-state conflict.

During the war, the Argentine Navy transported men and weapon systems to the islands, creating a lifeline with mainland Argentina about 400 miles away. The Royal Navy went to war 8,000 miles away with six submarines leading the way, and they enforced an exclusion zone around the islands.

When the need arose, HMS Conqueror, a nuclear-powered attack submarine, sunk the ARA General Belgrano battlecruiser, one of the largest warships in the Argentine fleet. The shock of the sinking and the potential for further attacks forced the Argentine Navy to withdraw from the area, thus allowing the British ground forces to land unopposed.

Similarly, US submarines could help disrupt or destroy a Chinese amphibious force heading to Taiwan and limit the movements of the Chinese navy across the theater of operations.

Submarines aren't unstoppable, though. Advances in anti-submarine warfare have made submarines increasingly vulnerable. For China's navy, ASW has been a growing priority to counter the American sub threat. Additionally, uncrewed undersea vehicles can also pose a threat and help detect prowling subs, as can underwater sensor systems like the US operates and China has looked to as added security.

They can't stay under indefinitely without support. Munitions resupply — US subs are powered by nuclear force, meaning they don't have to refuel — is another challenge, especially in a high-intensity battlefield.

And the US faces challenges maintaining its undersea advantage. A key priority in the Navy's fiscal year 2025 budget proposal was investment in the submarine industrial base.

Submarine Fleet

The US Navy has the largest and most advanced submarine force in the world, with 71 vessels and a lot of variety. And given the challenges from China, much of that capability is in the Pacific.

The Navy's submarine fleet is comprised of attack, guided-missile, and ballistic-missile subs.

Attack subs are the staple of any submarine fleet. Their job is to find and sink enemy ships. The three classes of attack subs in the US fleet (Virginia, Los Angeles, and Seawolf) can do this by sailing stealthily underwater and firing torpedoes and cruise missiles. The Navy has 53 attack subs.

Guided-missile submarines support ground and naval forces by firing long-range munitions, but they can also sink enemy shipping via torpedoes. Each of the four Ohio-class guided-missile subs on the active fleet can pack over 150 Tomahawk cruise missiles.

Finally, ballistic-missile submarines make up America's maritime arm of the nuclear triad. The 14 Ohio-class ballistic missile submarines carry 20 Trident II ballistic missiles with nuclear warheads each. Although the subs also pack torpedoes like their attack and guided-missile siblings, the main mission of ballistic-missile subs is to rain down destruction in the event of a nuclear conflict.

• American Airlines briefly grounded all of its US flights over a technical issue.
• "Your safety is our utmost priority," the airline said in a post on X.
• After around an hour, a nationwide groundstop issued by the FAA was lifted.

American Airlines grounded all of its flights across the US for around an hour on Tuesday, saying it was experiencing technical issues as airlines gear up for the Christmas travel rush.

The Federal Aviation Administration said in an advisory statement early on Tuesday morning that the airline's flights across the US were grounded. An update around an hour later said the nationwide groundstop was canceled.

The extent of the resulting disruption is unclear.

American Airlines did not make a general comment on the incident but replied to users on X who were posting about the disruption.

"Your safety is our utmost priority. Once rectified we'll get you safely in the air and where you need to be," the airline said in response to one user who posted on X about the disruption.

In another post, it said "We're currently experiencing a technical issue with all American Airlines flights. Your safety is our utmost priority, once this is rectified, we'll have you safely on your way to your destination."

The issue prevented the airline from calculating weight and balance requirements for its flights, Bloomberg reported.

Users on X said they were made to get off their planes on Tuesday morning.

The airline told one user that it was not able to estimate when planes would be taking off again. "Our team is currently working to get this done. An estimated timeframe has not been provided, but they're trying to fix it in the shortest possible time," the airline wrote.

The disruption comes on Christmas Eve, one of the biggest travel days of the year.

The Transportation Security Administration said it expected to screen almost 40 million people through airports over the holidays, more than a 6% increase from last year.