Behind the scanner

Airport security: 10 TSA insider secrets you're finally about to learn

You’ve likely stood barefoot in an airport security line, clutching a plastic bag of toiletries and hoping to get through the scanners without a hitch, right? But have you ever wondered what it’s like to be on the other side of the scanner? TSA agents, officially called Transportation Security Officers (TSOs), do more than wave passengers through. Their job goes from simple tasks like checking IDs and screening bags, to crazier things like chasing fugitive cats. Here’s a closer look and some surprising facts at what their job really involves.

We may know the 3-1-1 rule by heart: Containers must hold 3.4 oz or less, all containers must fit into one clear 1-quart-sized bag, and we’re limited to one bag per passenger. But there’s always that bottle of wine we brought as a souvenir in the carry-on or a bougie face cream we tried to bring along. Now, what happens to the items they confiscate?

TSA officers don’t keep those items, and they can’t profit from them either. Once you choose to leave something behind, it typically becomes property of the state. From there, it’s sorted, stored, and passed along to surplus programs. Plenty of perfectly usable items, like tools, unopened toiletries, and even an occasional snow globe, get shipped off to state surplus centers. Later on, they’re sold in bulk through government auction sites like GovDeals or GSA Auctions.

Even when the rules are clear, someone always shows up with a handmade knife or an oversized bottle of perfume tucked in their carry-on. And it feels like a sting when an agent "takes" those things away. From your side, it can feel like the agent just takes it, and that’s the end of the story. However, here’s a twist: In the eyes of the law, the TSA isn’t "taking" anything.

Legally, according to TSA security policy and regulations, you voluntarily surrender items. In fact, they are required to give you options first. You can put the items in a checked bag, give them to a friend who isn't flying, or mail them home if the airport has a mailing center.

Now that you know you have options before surrendering an item, here’s a tip. If you realize you’ve got something valuable that isn’t allowed through security: ask about mailing options before you give it up. Many airports now have small shipping kiosks right near the checkpoint.

You can send that item home instead of losing it for good. It’s especially handy for things like quality pocketknives or small tools that mean something to you.

You might think the TSA is only on the lookout for high-level criminals, but according to former TSOs, the real terminal-stoppers are much smaller and fuzzier. Believe it or not, runaway cats cause more legitimate security breaches than almost anything else.

If a skittish cat escapes its carrier before being properly scanned, it can force a supervisor to shut down an entire terminal. Chasing a cat through the scanners or behind the luggage belt is a major security protocol that can delay a flight for hours while the agents try to apprehend the four-legged fugitive.

You know that little moment at the checkpoint where coins spill out of your pocket into the bin? A few pennies here, a couple of quarters there, and the occasional bill. Most people don’t bother picking them back up. Now multiply that by millions of travelers a year.

TSA reports collecting hundreds of thousands of dollars in loose change annually. For example, in Fiscal Year 2024, $939,814.20 were collected. However, that’s not pocket money for the agency, either. By law, that money goes back into funding aviation security.

It happens more often than you’d think. A traveler rushes through security, juggling the boarding pass, a phone, maybe a cup of coffee, and leaves their driver’s license behind in a bin. But that doesn’t mean they lost it.

TSA does make an effort to return those items. Airports have a system in place to track and reunite lost IDs with their owners. But there’s a limit. If no one claims it within 30 days, it gets destroyed. That’s done for security reasons, to keep personal information from falling into the wrong hands.

While a forgotten bottle of water ends up in a trash can, and a face cream goes to a surplus auction, firearms are handled very differently.

The TSA has a zero-tolerance policy for guns in carry-on bags. The second a weapon is spotted on the X-ray, the situation is handed over to local law enforcement. TSA agents don't confiscate guns; they call the police, who take possession of the weapon and the traveler, and the situation becomes a legal matter. This scenario isn’t rare at all, every year, approximately 6,000 firearms are intercepted at U.S. airports.

If you’ve walked through an airport recently, you’ve probably seen an agent with a dog sniffing through the crowd. A lot of people assume those dogs are looking for drugs, but in most cases, they’re not.

TSA dogs are usually trained to detect explosives, not narcotics. They’re focused, highly trained, and working the entire time you see them. As cute as they are, TSOs constantly request people not to pet them. It’s best to give them space and let them do their job. No petting, no calling out. They seem friendly, but they’re not there to make friends.

The job of a TSO can be exhausting. It demands hours of looking at a screen in search of possible threats. Because of that, agents often face high levels of stress and "search fatigue." Over time, the brain starts to expect everything to be normal. That’s called expectation bias, and it can make it harder to spot something unusual.

To make sure the system works, agents rotate from the scanner every 30 minutes, which is when the brain can start to miss anomalies. This rotation to a different task, like checking IDs or searching bags, helps keep agents sharp and reduces the risk of mistakes.

TSOs don’t just put on a blue shirt and start scanning bags. Following FAA regulations, becoming a certified officer involves classroom instruction and weeks of supervised training on the floor. New hires spend time learning how to read X-ray images, recognize threats, and follow detailed procedures. After that, they work under supervision before being fully cleared. And the learning doesn’t stop there. Agents go through regular testing and annual evaluations to stay certified.