SWAT teams enter a suburban neighborhood to search an apartment for the remaining suspect in the Boston Marathon bombings in Watertown, Massachusetts April 19, 2013. Two Boston bomb suspects were named as brothers, Dzhokhar A. Tsarnaev, 19, and his brother Tamerlan Tsarnaev, 26, a U.S. national security official said on Friday. The official said the older brother died in a shootout with police and the younger one was being sought in a house-to-house search for in the Boston suburb of Watertown. REUTERS/Jessica Rinaldi (UNITED STATES – Tags: CIVIL UNREST CRIME LAW TPX IMAGES OF THE DAY) – RTXYS2U