Project Blue Book Case #943. On July 24, 1951, a bright object was observed over Portsmouth, New Hampshire — the colonial seaport that was home to Pease Air Force Base, a major SAC bomber installation on the northeastern seaboard. Pease's B-47 bombers carried nuclear weapons on alert, and the base's coastal position made it a first-response facility for any threat approaching from the Atlantic. The case was classified "Unknown."