2016 saw a record-breaking amount of firearms discovered in carry-on bags, according to TSA.
At USA checkpoints, 3,391 firearms were discovered and 83 percent of them were loaded. This was a 28 percent increase from 2015.
TSA discovered a lot of hidden items too, like comb/brush knives, belt buckle knives or sword canes.
TSA says to always check your carry-ons to make sure you don't accidently bring prohibited items, which does happen.