CHATTANOOGA, TN - JULY 17: Miller-Motte Technical College students and others join in prayer across the highway from the strip mall where a gunman attacked the Armed Forces Career Center/National Guard Recruitment Office on July 17, 2015 in Chattanooga, Tennessee. According to reports, Mohammod Youssuf Abdulazeez, 24, opened fire on the military recruiting station at the strip mall on July 16th and then drove to an operational support center operated by the U.S. Navy more than seven miles away and killed four United States Marines there. (Photo by Joe Raedle/Getty Images)

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