Senior Airman Samuel Avila, an aeromedical technician with the 779th Aerospace Medicine Squadron, briefs the mission operations of the Aeromedical Staging Facility to the former chief master sergeants of the Air Force tour on Joint Base Andrews, Md., March 10, 2010. Five former chief master sergeants of the Air Forces and their spouses, along with Chief Master Sgt. James A. Roy, attended the tour. After the tour, Chief Roy continued on to do an enlisted call for Team Andrews at the base theater. (U.S. Air Force photo by Staff Sgt. Renae L. Saylock)