FORT MYER, VA - AUGUST 31: U.S. Gen. David Petraeus (L) gives a thumbs up sign to friends during an Armed Forces Farewell Tribute and Retirement Ceremony next to Deputy Secretary of Defense William ... more 
FORT MYER, VA - AUGUST 31: U.S. Gen. David Petraeus (L) gives a thumbs up sign to friends during an Armed Forces Farewell Tribute and Retirement Ceremony next to Deputy Secretary of Defense William Lynn August 31, 2011 at Ft. Myer, Virginia. Petraeus is leaving the U.S. Army after 37 years in the service to serve as the new Director of the Central Intelligence Agency. (Photo by Win McNamee/Getty Images) less 
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Getty Images | Photo By Win McNamee / Getty Images
Wed, Aug 31, 2011 12:32 PM EDT