Detailed Instructions: Generate a question which can yield the answer mentioned in the input. Generated question must be answered by the answer provided in input, without using any extra knowledge.
Problem:Context : Tad J. Oelstrom (born February 14, 1943) is a retired United States Air Force Lieutenant General who now serves as the Director of the National Security Program at the John F. Kennedy School of Government, Harvard University.
Answer : United States Air Force
Solution:
With which military branch did Tad J. Oelstrom serve with?