Some of the deadliest military air crashes in Afghanistan since the U.S.-led invasion on Oct. 7, 2001:

-Aug. 16: A U.S. Army Black Hawk helicopter crashes in southern Kandahar province, killing seven American troops and four Afghans on board; the Taliban claim they shot the aircraft down.

-April 19: A U.S. Army helicopter crashes in bad weather during a night flight in Afghanistan, all four American crew members are killed.

-March 16: A Turkish military helicopter crashes into a house near the Afghan capital, killing 12 Turkish soldiers on board and four Afghan civilians on the ground.

-Aug. 6, 2011: Insurgents shoot down a Chinook helicopter in eastern Wardak province, killing 30 American troops, mostly elite Navy SEALs, along with seven Afghan commandos and a translator.

-Sept. 21, 2010: U.S. Army Black Hawk crashes in southern Zabul province, killing nine troops on board, including four Navy SEALs.

-May 30, 2007: U.S. Chinook crashes while under fire in southern Helmand, killing one British, one Canadian and five American troops.

-Feb. 18, 2007: U.S. Chinook carrying 22 U.S. soldiers crashes in southern Zabul province, killing eight and injuring 14.

-Sept. 2, 2006: British Nimrod aircraft crashes near Kandahar in the south, killing 14 crew members.

-May 5, 2006: U.S. Chinook helicopter crashes while attempting a night landing on a small mountaintop in eastern Kunar province, killing 10 U.S. soldiers.

-Aug. 16, 2005: Spanish helicopter crashes near the western city of Herat, killing 17 Spanish soldiers.

-June 28, 2005: U.S. helicopter is shot down in eastern Kunar province during a rescue operation, killing 16 special operations troops.

-April 6, 2005: U.S. Chinook helicopter crashes in a sandstorm near eastern Ghazni, killing 15 American troops and three civilian contractors.

-Dec. 21, 2002: German army helicopter crashes in Kabul, killing seven German soldiers.

-March 4, 2002: U.S. Chinook helicopter is shot down in eastern Afghanistan, killing seven American troops.