Boston Police Commissioner Edward Davis testifies before the House Homeland Security Committee at a hearing on "The Boston Bombings: A First Look," on Capitol Hill in Washington, Thursday, May 9, ... more 
Boston Police Commissioner Edward Davis testifies before the House Homeland Security Committee at a hearing on "The Boston Bombings: A First Look," on Capitol Hill in Washington, Thursday, May 9, 2013. Former Sen. Joeseph Lieberman, I-Conn., sits at left, and photos of those who were killed at the Boston Marathon bombing are at right. (AP Photo/Susan Walsh) less 
1 / 28
Associated Press | Photo By Susan Walsh
Thu, May 9, 2013 11:05 AM EDT