Invasion, U.S.A. is a 1952 movie about an attack on the United States. In the movie, an evil Soviet agent from Russia plans to take over the United States by bombing it with airplanes and launching missiles from ships. The American citizens have to band together in order to fight back and save their country. They use everything from hot-air balloons to a special plane to try and protect their land from the attack. In the end, the people of the United States are able to save their country and the evil Soviet agent is caught. It's an exciting movie that shows how people can come together in order to battle a common enemy.