On August 6, 2011, Technical Sergeant Daniel L. Zerbe, Technical Sergeant John W. Brown, both pararescuemen, and Staff Sergeant Andrew W. Harvell, a combat controller, assigned to the 24th Special Tactics Squadron, 724th Special Tactics Group, were killed when their coalition CH-47 Chinook helicopter crashed in Maiden Wardak Province in eastern Afghanistan. They were among twenty-five Special Operations Command operators who died in the crash, which also took the lives of five Army Reserve Soldiers, seven Afghan commandos and one civilian interpreter.