April 21, 2013 THE COAL SPEAKER Boston bombers: FBI hunting 12-strong terrorist “sleeper cell” linked to brothers Tamerlan and Dzhokhar Tsarnaev FacebookTwitterA must read report.. Boston bombers: FBI hunting 12-strong terrorist “sleeper cell” linked to brothers Tamerlan and Dzhokhar Tsarnaev FacebookTwitter Tweet Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related