Vice President Joe Biden addresses the American-Israeli Public Affairs Committee (AIPAC) 2013 Policy Conference, Monday, March 4, 2013, at the Walter E. Washington Convention Center in Washington. (AP Photo/Susan Walsh)

Photo by: Susan Walsh

Vice President Joe Biden addresses the American-Israeli Public Affairs Committee (AIPAC) 2013 Policy Conference, Monday, March 4, 2013, at the Walter E. Washington Convention Center in Washington. (AP Photo/Susan Walsh)