Boston Terror Attack and Lockdown: A Timeline

Boston Terror Attack and Lockdown: A Timeline

Social Media Profile of Suspect

A photograph of Djohar Tsarnaev, who is believed to be Dzhokhar Tsarnaev, a suspect in the Boston Marathon bombing, is seen on his page of Russian social networking site Vkontakte (VK), as pictured on a monitor in St. Petersburg April 19, 2013. Tsarnaev posted links to Islamic websites and others calling for Chechen independence on what appears to be his page on the site. Police launched a massive manhunt for Tsarnaev, 19, after killing his older brother Tamerlan Tsarnaev in a shootout overnight.

REUTERS/Alexander Demianchuk