President Barack Obama walks with Marine Gen. Joseph Dunford Jr., his nominee to be the next chairman of the Joint Chiefs of Staff, after speaking in the Rose Garden of the White House in Washington, Tuesday, May 5, 2015. Obama chose the widely respected, combat-hardened commander who led the Afghanistan war coalition during a key transitional period during 2013-2014 to succeed Army Gen. Martin Dempsey. Walking behind them is Vice President Joe Biden. (AP Photo/Pablo Martinez Monsivais)
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