CNN The Situation Room April 15, 2013 21:28:00
Sheld sheldon, are you there? >> yes, i'm here. >> tell us your last name. >> my name is sheldon irkenbrak. >> where were you, sheldon at the time of the bombings? >> i was on boylston street directly across from where the second blast occurred. >> what was it like? what did you see? >> the first blast i think toward the finish line, which i'm about a half a block away, a white cloud of smoke. then about 20, 30 seconds later i -- that's when the second blast, and it literally threw me back, knocked over some of the barricades and i noticed several injuries, flying debris, and just kind of chao...