In 1954 the United States prepares to set off an atomic bomb. The hydrogen bomb is tested in the South Pacific.  The narrator states that the bomb was 500 times the magnitude of the Hiroshima bomb. A small boat approches a military boat. CU of a hand unlocking a lock. A man speaks into the boat's intercom. Men put on goggles. A zoom in shot of the explosion. Men cover their faces to avoid the explosion. The explosions smoke covers the shore and shakes the ground. A LS of the explosion's mushroom cloud.