Guns and ammunition is routinely found by TSA screeners, who often pick up dozens of firearms a week. Some passengers, however, still try to get away with it, occasionally in especially sneaky ways.
If you thought pen pistols could only be carried either by super spy or total maniacs, you'd be half right. A pen pistol was found by security agents in Allentown airport in Pennsylvania.
The passenger denied the device was in fact a weapon, though later owned up to it.