My first thought when I woke up this morning was that I would find out who bombed the Boston Marathon, and maybe why. As of this writing, no explanation is available. From a practical standpoint, that should not bother me so much; it pales in comparison to knowing that, say, an eight year-old boy was among those killed, or that several people who had just finished running 26 miles suddenly had their legs blown off. That is catastrophe, right there. It is disaster, in the same sense as a tornado or an earthquake, which also happened yesterday. The difference is that in nature, a bunch of screws and BB’s and nitrates do not spontaneously fly together and make a bomb. Somebody had to do that, and I would like to know who it was so that this disaster can become a tragedy.