I lived in the Boston area for most of the period between 1980 and 2001, and was therefore especially saddened by today’s terrible bombing there. Fortunately, none of my many relatives and friends in the area were hurt, though obviously many others were not so lucky.
The nature of the attack clearly suggests that it may well be terrorism. But it may be a while until we know for sure, and also until we know exactly who did it and why.