Members of the 60th Security Forces Squadron and the

Members of the 60th Security Forces Squadron and the 821st Contingency Response Group perform pushups to honor the 13 defenders who gave the ultimate sacrifice at the conclusion of 24-hour ruck march at the Duck Pond on Travis Air Force Base, Calif. Security forces members from the 60th Air Mobility Wing and the 821st Contingency Response Group honored 13 fallen defenders with this memorial ruck march. (U.S. Air Force photo by Tech. Sgt. David W. Carbajal)