Thousands of alien hunters are gearing up to storm Area 51, America's most secretive and secure military base shrouded in extraterrestrial conspiracy theories. More than 165,000 people have RSVP'd 'yes' to a Facebook event inviting anyone brave enough to infiltrate the compound in the Nevada desert, titled 'Storm Area 51, They Can't Stop All of Us'. The conspicuous event is scheduled to take place on September 20, though it's very likely few, if any, are actually serious about attending. The last known person who went hunting for aliens at Area 51 was shot dead by guards back in January.