The name Roswell has become synonymous with UFOs and extraterrestrials thanks to decades of conspiracy theories centered on what may or may not have been found by the U.S. Army near Roswell, N.M., on July 7, 1947. The government says it found remnants of a top-secret weather balloon. Many others, however, including some who worked on site where the craft was found, say it was an alien spacecraft. What followed was a cover-up that reached the highest levels of the military.