I have always felt that airports especially, should allow anyone with a CCW to carry. Not knowing who on any given flight is armed would be a huge deterrent. Think about how things could have been very different on 9-11 if even one passenger had been armed on those planes. I know someone will use the argument that you will shoot a hole in the plane and decompression, but I promise you, it doesn't work that way. If you shoot a hole in a plane, all that happens is that you make a hole in the plane. A wad of gum will fix it till you land. The big concern is collateral damage. Are you willing to take a shot that will probably injure, maybe kill an innocent?