Petraeus: 'Much work remains' to be done in Afghanistan

BAGRAM AIRFIELD, Afghanistan — Outgoing U.S. commander Gen. David Petraeus saluted his troops for the last time as their military leader on the Fourth of July as three U.S. senators made a surprise visit and chastised the White House for its troop withdrawal plans. - Petraeus: 'Much work remains' to be done in Afghanistan
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