US Secretary of Defense Leon Panetta greets members of the helicopter medivac crew attached to the 115th Combat Support Hospital while making an unannounced visit to Camp Dwyer, Sunday July 10, 2011, in southern Afghanistan. Panetta visited troops in southern Afghanistan as part of his first trip to the country since taking up his post and ahead of a withdrawal of some US forces. (AP Photo/Paul J. Richards Pool)

Associated Press
US Secretary of Defense Leon Panetta greets members of the  helicopter medivac crew attached to the 115th Combat Support Hospital while making an unannounced visit to Camp Dwyer,  Sunday July 10, 2011, in southern Afghanistan.  Panetta visited troops in southern Afghanistan  as part of his first trip to the country since taking up his post and ahead of a withdrawal of some US forces. (AP Photo/Paul J. Richards Pool)
US Secretary of Defense Leon Panetta greets members of the helicopter medivac crew attached to the 115th Combat Support Hospital while making an unannounced visit to Camp Dwyer, Sunday July 10, 2011, in southern Afghanistan. Panetta visited troops in southern Afghanistan as part of his first trip to the country since taking up his post and ahead of a withdrawal of some US forces. (AP Photo/Paul J. Richards Pool)
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