FILE - In this Jan. 24, 2013 file photo, Joint Chiefs Chairman 

FILE - In this Jan. 24, 2013 file photo, Joint Chiefs Chairman Gen. Martin Dempsey takes part in news conference at the Pentagon in Washington. Dempsey traveled to Afghanistan Saturday, April 6, 2013 to meet U.S. and allied commanders and consult with Afghan officials on winding down the war. (AP Photo/Cliff Owen, File)
Associated Press
FILE - In this Jan. 24, 2013 file photo, Joint Chiefs Chairman Gen. Martin Dempsey takes part in news conference at the Pentagon in Washington. Dempsey traveled to Afghanistan Saturday, April 6, 2013 to meet U.S. and allied commanders and consult with Afghan officials on winding down the war. (AP Photo/Cliff Owen, File)
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