evidence: March 11, 2013: A helicopter crash in southern Afghanistan kills five American service members. Two US special operations forces were gunned down hours earlier in an insider attack by an Afghan policeman in eastern Afghanistan. August 6, 2011: A helicopter is shot down by an armed group with a rocket-propelled grenade, killing 30 American troops and eight Afghans. [...] September 21, 2010: A helicopter crashed in a rugged section of southern Afghanistan, killing nine. The Defense Department said three were Navy SEALs and one was assigned to the Naval Special Warfare unit. Five were soldiers from the 101st Combat Aviation Brigade, 101st Airborne Division, at Fort Campbell, Kentucky.