"Manned Spaceflight Engineer Program"@en . . "The Manned Spaceflight Engineer Program was an effort by the United States Air Force (USAF) to train American military personnel as payload specialists for Department of Defense (DoD) missions on the Space Shuttle program."@en . "The Manned Spaceflight Engineer Program was an effort by the United States Air Force (USAF) to train American military personnel as payload specialists for Department of Defense (DoD) missions on the Space Shuttle program."@en . . . . . . .