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

 

              British Prime Minister David Cameron, left, walks with Massachusetts Gov. Deval Patrick into the Massachusetts Statehouse in Boston, Monday, May 13, 2013. Cameron met with Patrick to of
British Prime Minister David Cameron, left, walks with Massachusetts Gov. Deval Patrick into the Massachusetts 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)