Roswell UFO incident
Friedman was the first civilian to document the site of the Roswell UFO incident, and supported the hypothesis that it was a genuine crash of an extraterrestrial spacecraft. In 1968 Friedman told a committee of the United States House of Representatives that the evidence suggests that Earth is being visited by intelligently controlled extraterrestrial vehicles. Friedman also stated he believed that UFO sightings were consistent with magnetohydrodynamic propulsion.