sentences:  In 1980, two crews assigned to the 644th Bombardment Squadron of the 410th BW (S-21 and S-31) were awarded the Mackay Trophy for "executing a nonstop, around-the-world mission with the immediate objective of locating and photographing elements of the Soviet Navy operating in the Persian Gulf.The 410th was reassigned directly to Eighth Air Force on 8 June 1988 and redesignated the 410th Wing on 1 September 1991 when SAC implemented the Objective Wing concept.On 1 June 1992, the redesignated 410th Bomb Wing was assigned to the new Air Combat Command.