How a doctor's daughter from Rhode Island married Tamerlan Tsarnaev

This is one of the things that has bothered me about the Marathon terrorists: How an all-American doctor's daughter from Rhode Island ended up married to Tamerlan Tsarnaev. London's Daily Mail tries to supply some answers.

One classmate who remembers Katherine from those early days said: ‘The thing that’s so shocking is that there was nothing at all that made Katherine different.

‘Her parents