A squad of Airmen from the 51st Security Forces Squadron at Osan Air Base, South Korea, who are attempting to qualify for the base’s quick response team, secure a 100-pound wooden beam on their shoulders as they complete a 5K march Aug. 9, 2011. To become a member of the base’s QRT, Airmen have to overcome challenges which test their strength and endurance, but also test their ability to act as a cohesive squad. (U.S. Air Force photo/ Senior Airman Adam Grant)