For anyone worried about handguns on planes and how dangerous they are, take a look at some videos of the damage a WWII fighter or bomber could absorb and still keep flying. And we're not talking handgun rounds...more like 20mm, artillery flak and really big, incendiary shit. And that was 40s technology.
Personally, I'm not worried about guns on planes. Some of you guys make it sound like an otherwise rational, law-abiding person is gonna go apeshit and shoot the plane outta the sky just because he/she is allowed to carry on a plane.