Much has been said about the Boston bombers, about their possible motives, their origin, their upbringing and their thinking. We know quite a bit by now about Tamerlan and Dzhokhar Tsarnaev. The older brother had links to radical circles and liked to watch extremist Chechen Islamist videos on Youtube; the FBI even interviewed him in 2011 after the Russian security apparatus showed concern. His younger brother seemed a nice enough chap without political affiliations, who was probably dragged into the radical abyss by his brother.




