sentences:  In 1973, Kelley was assigned to the Air Force headquarters in Washington, D.C., where he served as Chief of the Fighter Forces Branch in the Office of the Deputy Chief of Staff for Plans and Operations.He was a member of the Tactical Fighter Force Modernization Study Group convened by the Chief of Staff and charged with developing a modernization strategy for the 1980s.He became Assistant for General Officer Matters at the Office of the Deputy Chief of Staff, Personnel, in June 1974.