This is what happens to an airplane when it hits a concrete wall at 500mph. Air Force engineers test a concrete barrier that will surround a nuclear reactor dome, to see if it would indeed survive an aerial attack. With the high speed cameras rolling, they attached an F-4 Phantom to the sled and then pumped up the speed to 500 MPH, and... What happens when an 'Unstoppable Force' meets an 'Immovable Object? Watch in slow motion as the F-4 turns to vapor.
