5 Days: ABC News special report relives the Boston Marathon Bombing in great detail

The anniversary of the 2013 Boston Marathon bombing just passed and ABC is remembering the tragic event with a special series they called 5 Days that relives the events and the aftermath of the bombing in great detail. A lot of stuff so far in the first two videos have never been seen or heard before -- like 911 calls, surveillance footage, and intimate details from the FBI on how they ended up focusing on the Tsarnaev brothers.

The videos are being released slowly, 1 per day, in a 5-video series this week. So far, 2 days have been shared. You can find those videos below.