As Boston buries its dead, more evidence gathered - Article Photos 4/26

Audrey Gasteier, left, of Cambridge, Mass., and Aminata Ndiaye, center, of Boston, join others to observe a minute of silence at City Hall Plaza in Boston for the victims of the Boston Marathon bombings Monday, April 22, 2013, one week after the explosions. The remembrance was held at 2:50 p.m., the time the first of the two bombs exploded near the race's finish line. (AP Photo/Bill Sikes)