"A sign outlining ""obligatory prayers"" hangs on the sanctuary at the Islamic Society of Boston mosque in Cambridge, Mass., on Friday, April 19, 2013. A mosque official confirmed that the two suspects in the Boston Marathon bombings, who lived a short distance away, worshipped there occasionally. Tamerlan Tsarnaev ranted at a neighbor about Islam and the United States. His younger brother, Dzhokhar, relished debating people on religion, ""then crushing their beliefs with facts."" (AP Photo/Allen Breed)"
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