I’ve been refraining from commenting on the Boston Marathon bombings because I feel like don’t yet have enough information. Dr Delacroix speculates here. Law professor and Russian immigrant Eugene Kontorovich has more on Chechens and Boston’s fall here.

I have found this piece by Clark over at Popehat to be the most illuminating yet. I can’t excerpt the good parts because the whole thing is really, really good.

Update: the Wall Street Journal has a great profile up on the Tsarnaev brothers.