Project 10073 Record Card — Denver, Colorado, 9 July 1954

On July 9, 1954, at approximately 0920Z, a sighting of six to seven unidentified objects occurred near Lowry Air Force Base in Denver, Colorado. The objects were described by multiple witnesses, including military personnel and civilian flight dispatchers from United Air Lines, as round, silver, and roughly the size of a dime. The witnesses reported that the objects were traveling at an estimated altitude of 35,000 to 50,000 feet and at speeds between 1,200 and 1,500 miles per hour. The objects were observed performing extreme maneuvers, including zig-zagging, revolving, and hovering for extended periods. Despite the presence of Operation Check Point in the vicinity, which involved F-86 aircraft, the objects were not identified as conventional aircraft. Radar personnel from the 3035th Radar Bomb Squadron reported no unusual contacts on their scopes during the time of the sighting. The weather conditions were reported as clear with 40 miles of visibility and high cirrus clouds. The official preliminary analysis suggested the objects were a very high-speed type of aircraft capable of extreme maneuvers. The incident was documented through a Project 10073 record card and subsequent correspondence between the 14th OSI District and the Air Technical Intelligence Center at Wright-Patterson Air Force Base.