An Air Force honor guard detail folds the American flag during an all-female retreat ceremony at the 60th Air Mobility Wing's headquarters at Travis Air Force Base, Calif., March 19, 2015. The ceremony included more than 200 active duty, reserve, veteran and civilian women. The event was part of the second annual National Women's History Project. Though not yet official, organizers of the ceremony aimed to make it the largest in American history. (U.S. Air Force photo/Ken Wright)