> "The scanners are deterring people from carrying weapons right now." The scanners aren't deterring anyone who wasn't already deterred by simple metal detecto

> "The scanners are deterring people from carrying weapons right now." The scanners aren't deterring anyone who wasn't already deterred by simple metal detectors. Has there ever been a single case of an "impulse crime" committed with a weapon on a plane, prior to the installation of body scanners?