article_snippet.sent: Scroll down for video . '
article_snippet.sent: Above, the After Action Report, which was released on Friday .
article_snippet.sent: This graphic, featured in the long-awaited report by the Massachusetts Emergency Management Agency, released Friday, details the timing of the two bombs and the following incidents .
article_snippet.sent: The document particularly highlights the response of medical personnel at the scene and Boston hospitals who treated injured bombing victims, 16 of whom suffered 'traumatic amputations'. '
article_snippet.sent: A further 264 people were wounded in the worst attack on US soil since the 9/11 terrorist atrocity.
article_snippet.sent: The first of the brothers' two IEDs detonated at 671 Boylston Street.
article_snippet.sent: Thirteen seconds later, 180 yards up, the second exploded.
article_snippet.sent: Seconds later, one of two bombs exploded, piercing the second suspect body with shrapnel .
article_snippet.sent: This picture, featured in the report, shows the labels that were placed on victims after the bombings .
highlights_snippet.sent: Three people were killed in April 15 attacks - a further 264 were injured .