>4) typical 0.223 rounds are 2500 to 3500 fps.
That's muzzle velocity, anon.
Drop off about 500 ft/s at the range it was supposedly fired.
>1) Vegas
>2) Hawaii Missile Crisis
>3) Butler, PA
>AT LEAST 3 [Known] attempts.
Scotland paraglider
Food taster
Car ramming motorcade