High Quality Content by WIKIPEDIA articles! The Mariana UFO incident occurred in August 1950 in Great Falls, Montana. The event garnered media attention, as the concept of UFOs and alien invasion was extremely popular amongst Americans at the time. At 11:25 am on August 5 or August 15, 1950, Nick Mariana, the general manager of the Great Falls "Electrics" minor-league baseball team, and his nineteen-year old secretary, Virginia Raunig, were inspecting the empty Legion Stadium baseball field before a game.