Senior Airman Gary Dennis, left, Staff Sgt. Michael Trala, center, and Airman 1st Class Aaron Wroblewski, all assigned to the 66th Medical Squadron, retrieve the flag during a formal retreat ceremony on base last year. At Hanscom, retreat is played to mark the end of the duty day and precedes the playing of the national anthem. (U.S. Air Force photo by Jerry Saslav)