This combo of photos released by the FBI early Friday April 19, 2013, shows what the FBI is calling suspects number 1, left, and suspect number 2, right, walking through the crowd in Boston on Monday,... more 
This combo of photos released by the FBI early Friday April 19, 2013, shows what the FBI is calling suspects number 1, left, and suspect number 2, right, walking through the crowd in Boston on Monday, April 15, 2013, before the explosions at the Boston Marathon. (AP Photo/FBI) less 
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Associated Press | Photo By FBI
Fri, Apr 19, 2013 5:44 AM EDT