It is illegal to carry a firearm onto an airplane. This isn’t new.

Apparently, some Idaho passengers (still) didn’t get the memo.

Guns being discovered on carry-on luggage in Idaho airports is an ongoing problem for airport security. Recently, four firearms were discovered in a 24 hour period by the TSA. This time, two separate firearms were found in carry-on luggage at the Boise airport. They were both loaded with ammunition.

Coincidentally, both weapons were Smith & Wesson 9mm handguns, again both loaded. One passenger was attempting to board a flight to Portland, the other to Salt Lake City. Andy Coose, TSA federal security director in Idaho, explains that this problem simply isn't going away:

There is a definite trend and it is not a good one. Too many people are bringing loaded firearms into airports and showing up at TSA checkpoints nationwide. Gun owners need to be responsible when they fly and ensure that they do the right thing by either leaving their weapon at home, or packing it in their checked luggage and properly declaring it to the airlines. Otherwise, they may find themselves missing their flight while dealing with police and other security officials.

For those playing at home, 14 firearms have been discovered at the Boise airport so far this year. In all of 2016, 16 total firearms were found in carry-on luggage at the Boise airport.