Look back at Boston Marathon bombing

Published On: Apr 15 2013 03:24:15 PM CDT   Updated On: Jan 05 2015 09:22:52 AM CST
Boston Marathon first explosion goes off

The trial for Dzhokhar Tsarnaev, the man charged in the Boston Marathon bombings that killed three people and injured more than 200, begins Monday. Take a look back at scenes from the April 15, 2013, incident.