The short answer at this point is that we do not know and the Dish has learned not to speculate. We now have a graphic idea of what happened – but no context to make sense of it. Until the full context emerges, we’re not guessing.
(Photo: Two blood stained feet of a man hangs outside an ambulance outside a medical tent located near the finish of the 117th Boston Marathon after two bombs exploded on the marathon route on April 15, 2013 in Boston, Massachusetts. By Jim Rogash/Getty Images)