WDAY: The News Leader

Published April 18, 2013, 12:00 AM

Cathedral of the Holy Cross

People gather ahead of an interfaith service with President Barack Obama at Cathedral of the Holy Cross, held in the wake of Monday's Boston Marathon explosions, which killed at least three and injured more than 140, Thursday, April 18, 2013, in Boston. (AP Photo/Matt Rourke)
Read the article: Feds using photo analysis in Boston case