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CHATTANOOGA, TN - JULY 18: Ronald May prays as he supports a cross at a memorial setup in front of the Armed Forces Career Center/National Guard Recruitment Office which had been shot up on July 18, 2015 in Chattanooga, Tennessee. According to reports, Mohammod Youssuf Abdulazeez, 24, opened fire on the military recruiting station on July 16th at the strip mall and then drove to an operational support center operated by the U.S. Navy and killed four United States Marines there and a Navy sailor. (Photo by Joe Raedle/Getty Images)

CHATTANOOGA, TN - JULY 18:  Ronald May prays as he supports a cross at a memorial setup in front of the Armed Forces Career Center/National Guard Recruitment Office which had been shot up on July 18, 2015 in Chattanooga, Tennessee. According to reports, Mohammod Youssuf Abdulazeez, 24, opened fire on the military recruiting station on July 16th at the strip mall and then drove to an operational support center operated by the U.S. Navy and killed four United States Marines there and a Navy sailor.  (Photo by Joe Raedle/Getty Images)