By Evann Gastaldo As the Boston Marathon bombing investigation continues, the FBI is really zeroing in on dead suspect Tamerlan Tsarnaev‘s six-month trip to Russia last year, the New York Times reports. The elder of the Tsarnaev brothers visited two predominantly Muslim republics in the country’s north Caucasus region—Chechnya and Dagestan—both…

From: http://www.newser.com/story/166572/key-thread-in-boston-bombing-trip-to-russia.html