Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.

Gregory A. Feest (born 1956) is a United States Air Force Air Force major general who is currently serving as the Chief of Safety of the United States Air Force, Headquarters U.S. Air Force, Washington, D.C., and Commander, Air Force Safety Center, Kirtland Air Force Base, New Mexico.
What military branch did Gregory A. Feest belong to?