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

 

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