A breakthrough in the FBI investigation of the Boston Marathon bombing, as investigators release photographs and video of two suspects Thursday.<br/> <br />FBI Special Agent Richard DesLauriers is calling for the public's help.<br/> <br />(SOUNDBITE) (English) FBI SPECIAL AGENT RICHARD DESLAURIERS :<br/> <br />"We know that the public will play a critical role in in identifying and locating these individuals. Somebody out there knows these individuals as friends, neighbors co-workers or family members of the suspects."<br/> <br />Both men carried backpacks that were believed to contain bombs. The man identified as suspect number 1 wore a dark baseball cap. Suspect number 2 wore a white cap backwards.<br/> <br />The twin bomb attacks Monday killed three people and wounded 176 near the finish line at the Boston Marathon.
