Members of the U.S. Air Force Band march down Constitution Avenue during a practice run of the inauguration parade for President-elect Barack Obama Jan. 11, 2009 in Washington, D.C. “The inaugural period is a large-scale cooperative effort among federal, state and local agencies – it’s a great opportunity for our Airmen to work in a joint-interagency environment,” said Air Force District of Washington Commander Maj. Gen. Sharon K.G. Dunbar who also serves as the 320th Air Expeditionary Wing (AEW) commander. (U.S. Air Force photo/Senior Airman Tim Chacon)