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Children hold US flags as US President Barack Obama speaks in an overflow room during a visit to the Islamic Society of Baltimore, in Windsor Mill, Maryland on February 3, 2016. Obama offered an impassioned rebuttal of "inexcusable" Republican election rhetoric against Muslims Wednesday, on his first trip to an American mosque since becoming president seven years ago. / AFP / MANDEL NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

Children hold US flags as US President Barack Obama speaks in an overflow room during a visit to the Islamic Society of Baltimore, in Windsor Mill, Maryland on February 3, 2016.
Obama offered an impassioned rebuttal of "inexcusable" Republican election rhetoric against Muslims Wednesday, on his first trip to an American mosque since becoming president seven years ago. / AFP / MANDEL NGAN        (Photo credit should read MANDEL NGAN/AFP/Getty Images)