Massachusetts Gov. Deval Patrick, left, walks with British Prime Minister David Cameron through a corridor at the Statehouse in Boston, Monday, May 13, 2013. Cameron met with Patrick to

 

              Massachusetts Gov. Deval Patrick, left, walks with British Prime Minister David Cameron through a corridor at the Statehouse in Boston, Monday, May 13, 2013. Cameron met with Patrick to
Massachusetts Gov. Deval Patrick, left, walks with British Prime Minister David Cameron through a corridor at the Statehouse in Boston, Monday, May 13, 2013. Cameron met with Patrick to offer his condolences and discuss lessons that can be learned from the Boston Marathon attacks. (AP Photo/Elise Amendola)