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Photos

Snapshots of what’s happening in the Defense Department.

Vice President Joe Biden, left, President Barack Obama, second from left, Deborah Mullen and her husband, Navy Adm. Mike Mullen, outgoing chairman of the Joint Chiefs of Staff, observe the honor guard pass and review at the Chairman of the Joint Chiefs of Staff change of responsibility ceremony on Joint Base Myer-Henderson Hall, Va., Sept. 30, 2011. Mullen retired during the ceremony, bringing to a close his 43-year military career.

Vice President Joe Biden, left, President Barack Obama, second from left, Deborah Mullen and her husband, Navy Adm. Mike Mullen, outgoing chairman of the Joint Chiefs of Staff, observe the honor guard pass and review at the Chairman of the Joint Chiefs of Staff change of responsibility ceremony on Joint Base Myer-Henderson Hall, Va., Sept. 30, 2011. Mullen retired during the ceremony, bringing to a close his 43-year military career.

Vice President Joe Biden, left, President Barack Obama, second from left, Deborah Mullen and her husband, Navy Adm. Mike Mullen, outgoing chairman of the Joint Chiefs of Staff, observe the honor guard pass and review at the Chairman of the Joint Chiefs of Staff change of responsibility ceremony on Joint Base Myer-Henderson Hall, Va., Sept. 30, 2011. Mullen retired during the ceremony, bringing to a close his 43-year military career.

Photo Gallery