"This started out as a documentary on gun violence in America, but the largest mass murder in our history was just committed -- without the use of a single gun! Not a single bullet fired! No bomb was set off, no missile was fired, no weapon (i.e., a device that was solely and specifically manufactured to kill humans) was used. A boxcutter! -- I can't stop thinking about this. A thousand gun control laws would not have prevented this massacre. What am I doing?"