CHATTANOOGA, TN - JULY 17: Yellow tags mark bullet holes in the glass at 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 a military recruiting station at a strip mall and then killed four U.S. Marines at an operational support center operated by the U.S. Navy at another location more than seven miles away, where the gunmen himself was also killed. (Photo by Jason Davis/Getty Images)
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