A huge mushroom cloud was recently filmed at Area 51 by a couple of passers by who spotted the large plume of smoke from the mysterious top-secret US military airbase – thought to be the home of UFOs and aliens. Jimmy and Jackie posted a video to YouTube, which shows a plume of dark smoke rise from the UFO base as they drive towards it. Express.co.uk reports: When they reached the main gate, which has warning signs not to cross, there was another group of four people watching the smoke who were being monitored by a white security jeep parked up on a hill. Some conspiracy theorists claim the authorities conceal evidence of aliens visiting Earth from the public within the base. It has been claimed a “flying saucer complete with aliens” said to have crashed near Roswell, New Mexico, in 1947 was taken and stored there for examination. Some suggest they try to reverse engineer alien space craft there, but more grounded researchers claim it is just a testing site for new aircraft technologies. British UFO expert Mike Oram even claims he was abducted by aliens in league with military personal during a visit to Area 51. The base [...]