A 50 calibre U.S. Air Force door gunner waits as a patient is loaded onto his helicopter during a rescue mission for a wounded Afghan soldier in the Arghandab Valley, Kandahar province, southern Afghanistan, Thursday, July 29, 2010. Rescue teams one part of the U.S. Air Force's 451st Air Expeditionary Wing in southern Afghanistan. (AP Photo/Brennan Linsley)

Photo by: Brennan Linsley

A 50 calibre U.S. Air Force door gunner waits as a patient is loaded onto his helicopter during a rescue mission for a wounded Afghan soldier in the Arghandab Valley, Kandahar province, southern Afghanistan, Thursday, July 29, 2010. Rescue teams one part of the U.S. Air Force's 451st Air Expeditionary Wing in southern Afghanistan. (AP Photo/Brennan Linsley)