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Photos

Snapshots of what’s happening in the Defense Department.

President Barack Obama greets Navy Adm. Mike Mullen, outgoing chairman of the Joint Chiefs of Staff, and Defense Secretary Leon E. Panetta at the Joint Chiefs of Staff change of responsibility ceremony on Joint Base Myer-Henderson Hall, Va., Sept. 30, 2011. Army Gen. Martin E. Dempsey became the 18th chairman of the Joint Chiefs of Staff during the ceremony, succeeding Navy Adm. Mike Mullen who retired after 43 years of military service.

President Barack Obama greets Navy Adm. Mike Mullen, outgoing chairman of the Joint Chiefs of Staff, and Defense Secretary Leon E. Panetta at the Joint Chiefs of Staff change of responsibility ceremony on Joint Base Myer-Henderson Hall, Va., Sept. 30, 2011. Army Gen. Martin E. Dempsey became the 18th chairman of the Joint Chiefs of Staff during the ceremony, succeeding Navy Adm. Mike Mullen who retired after 43 years of military service.

President Barack Obama greets Navy Adm. Mike Mullen, outgoing chairman of the Joint Chiefs of Staff, and Defense Secretary Leon E. Panetta at the Joint Chiefs of Staff change of responsibility ceremony on Joint Base Myer-Henderson Hall, Va., Sept. 30, 2011. Army Gen. Martin E. Dempsey became the 18th chairman of the Joint Chiefs of Staff during the ceremony, succeeding Navy Adm. Mike Mullen who retired after 43 years of military service.

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