Two bombs went off near the finish line of the Boston Marathon. The cable news channels are all covering it, but there isn’t much information yet. There are some injuries, but no confirmed fatalities yet. There is some aerial footage from a helicopter and it looks like it happened in front of some bandstands. There is debris everywhere, lots of national flags have been trampled and soft barriers were crushed in an apparent stampede. The actual explosions produced a lot of white smoke. Apparently, about half the runners had completed the race.
Just as I was typing this, they got the footage of the explosions. It appears that they went off under the bandstands. It’s going to be pretty bad for the people who were sitting right under the blast.
Update [2013-4-15 16:2:56 by BooMan]: One of the bombs exploded down the street in front of a building. Shortly thereafter, a big fire broke out at the JFK library.