The Sierra Nevada has one of the most beautiful and dramatic landscapes in America. It is a land of extremes - from mountain peaks to scorching deserts - and the ultimate destination for thrill seekers. The Sierra Nevada is also a graveyard for over 2,000 crashed planes, including that of billionaire adventurer Steve Fossett. This is over 20 times more than the number believed to have been lost in the Bermuda Triangle. UFO expert Jeff Gonzales believes that the answer lies in the notorious Area 51. Rumours of captured alien technology have persisted since the Roswell ...