In 1955, details emerged of a military experiment conducted by the US Navy that has endured as a bizarre Second World War conspiracy. According to an eyewitness, 12 years earlier a warship had suddenly disappeared from a Philadelphia shipyard. It reappeared several minutes later. What had just happened? It's an incredible story that involves Albert Einstein, the theory of teleportation, and the possibility of extraterrestrial life. Fact or fiction? You decide.
Click through and relive the moment when aliens were blamed for abducting a battleship.