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Boston Deals With Aftermath Of Marathon Explosions

BOSTON, MA - APRIL 17: People walk to work past a flag flying at half-staff near the scene of twin bombings at the Boston Marathon on April 17, 2013 in Boston, Massachusetts. The explosions, which occurred near the finish line of the 116-year-old Boston race on April 15, resulted in the deaths of three people with more than 170 others injured. Security has been heightened across the nation as the search continues for the person or people behind the bombings. (Photo by Spencer Platt/Getty Images)

Boston Marathon bombing aftermath: Search for clues amid memorials

April 17, 2013

Authorities have reviewed countless photo and video evidence provided by the public as well as surveillance video from businesses near the finish line to aid their investigation into the twin bombs that exploded at the Boston Marathon on Monday. The crime scene also has been flooded with tributes for the victims.

Y! News: Latest updates on Boston Marathon bombing | Watch: Details of developments | Controversial Time cover | Photos: Horrific images after explosions