U.S. Service members perform pushups during the Task Force Maverick Spur Ride inside the clamshell at Bagram Airfield, Afghanistan, Feb. 21, 2012. Participants comprised of Soldiers, Sailors, Airmen and civilians completed a road march and were tested on their proficiency in various tasks such as land navigation, evaluating a casualty, donning chemical protective masks and assembling weapons systems in order to earn their golden combat spurs, which indicates an experienced Service member who has deployed and experienced combat with an Army cavalry unit.