Tamerlan Tsarnaev has been to Allston.
As children, Tsarnaev and his brother lived in Tokmok, Kyrgyzstan
 According to Novaya Gazeta, Tsarnaev had sought to join the local insurgency, and was put on a period of 'quarantine'  a clearance check by insurgents looking for infiltrating double agents, taking several months for a recruit to be verified

