“UFO CIRCLES WEAPONS STORAGE AREA,
Loring AFB, Maine, October 27, 1975” (NICAP.org)
It was Staff Sergeant Danny K. Lewis who first sighted the UFO near the Loring Air Force Base in Limestone, Maine. The UFO circled the nuclear weapons storage area to within 300 yards of the facility. After a while, the UFO began to hover 150 feet above the ground. And shortly thereafter, the base was placed on a major alert status. Radar tracked the UFO for over 40 minutes:
http://www.nicap.org/ncp/ncp-loringafb.htm
Loring Air Force Base was closed as an active U.S. Air Force installation in 1994.
Aerial view of Loring Air Force Base, Limestone,