On April 15, 2013, two pressure cooker bombs exploded during the Boston Marathon at 2:49 pm EDT, killing 3 people and injuring an estimated 264 others. The bombs exploded about 12 seconds and 210 yards (190 m) apart, near the finish line on Boylston Street.
Here are two videos regarding the Boston Marathon Bombing. The first is a combination of C-Span callers after the event, followed by other alternative media reporters who point out inconsistencies in the FBI official explanation. The second video is from Infowars.com where Alex Jones, provides his analysis of the event.
You may have missed my earlier post on the Boston bombing which is linked here. How much did the FBI know before?