FILE - In this May 23, 2011 file photo, President Barack Obama pauses as he shakes hands with people in the crowd after speaking at College Green in Dublin, Ireland. Mark Connolly, the second-in-command on President Barack Obama's security detail, far left, recently appointed Secret Service Director Joseph Clancy, far right, and Reggie Love, Obama's former personal aide at the White House. The Homeland Security Department is investigating two senior Secret Service agents accused of crashing a car into a White House security barrier, an agency spokesman says. (AP Photo/Carolyn Kaster)