Project 10073 Record Card and Related Correspondence: Unidentified Balloon Incident, Alaska, February 1959

This collection of documents details the interception and destruction of an unidentified balloon over Alaska in February 1959. The incident began on February 12, 1959, when an unidentified object was tracked by the Campion ACW station. Military aircraft, including T-33 and F-102 jets, were diverted to intercept the target. Pilots described the object as an elongated, milky-clear balloon, approximately 50 feet in diameter, with a 3-by-3-by-4-foot box suspended beneath it. One side of the box appeared to have a mirror-bright surface, and a 100-foot cable hung below it. After an initial unsuccessful firing pass by a pilot from the 317th Fighter Interceptor Squadron, a second pilot, Captain Y. L. Isbell, successfully fired 2.75-inch rockets at the target at an altitude of 33,000 to 34,000 feet. The balloon collapsed and descended at free-fall speed, disappearing into haze at approximately 20,000 feet. Despite subsequent search efforts, the wreckage was not recovered, as darkness and poor weather conditions hampered operations. Intelligence assessments from the Air Technical Intelligence Center (ATIC) noted that the object was too small to be a Skyhook balloon and that no known U.S. projects utilized such equipment. Officials speculated that the balloon might have originated from USSR territory or been released for a specific, unknown purpose. The documents emphasize that a definitive identification could not be made without the recovery and analysis of the suspended equipment. By April 1959, plans for an active search had been abandoned, with the understanding that if the equipment were ever found, it would be forwarded to ATIC for further investigation.