What happened
During an aerial refueling operation originating from Larson AFB, Washington, a collision occurred between two United States Air Force aircraft. The mission involved a KC-135 tanker and a Republic F-105D-15-RE Thunderchief, identified by registration 61-0091. After the refueling process was successfully completed at an altitude of 26,000 feet, the crew of the tanker began maneuvering to exit the area.
As the pilot-in-command of the tanker initiated a right-hand turn, the fourth engine of the KC-135 made contact with the cockpit window of the 61-0091 fighter. This impact caused both aircraft to lose control. The planes subsequently entered a steep descent into the rugged terrain of Death Valley National Park. The accident resulted in five fatalities, including all four crew members aboard the tanker and the pilot of the F-105D.
Findings
Official investigations were unable to determine a definitive reason for the collision, as the exact cause remains unestablished.