The Air Force destroyed an unarmed Minuteman 3 ICBM during a test launch following an unspecified "anomaly" mid-flight. (Ben Murray / Staff) VANDENBERG AIR FORCE BASE, Calif. — An unarmed U.S. Air Force Minuteman 3 intercontinental ballistic missile was intentionally destroyed in flight when an anomaly occurred during a test launch from California. An Air Force Global Strike Command statement says the flight was safely terminated over the Pacific Ocean at 4:42 a.m. Tuesday. 23 years old, and responsible for the nation's nukes Amid extreme weather and hours, missileers at Minot manage 150 of the nation's nuclear missiles. By: Tara Copp The Minuteman system's accuracy and reliability is routinely tested with launches from Vandenberg that send a missile's re-entry vehicle on a 4,200-mile (6,759-kilometer) flight to a target in the Kwajalein Atoll of the Marshall Islands. The Air Force says an anomaly is any unexpected event during a test and could arise from different factors. A launch analysis group is being formed from various Air Force organizations.