Police tape and a makeshift memorial sit on the lawn in front of an Armed Forces Career Center in this handout photo provided by the U.S. Navy, where earlier in the day a gunman opened fire, injuring one U.S. Marine in Chattanooga, Tennessee, July 16, 2015, The gunman later moved to the nearby Navy Operational Support Center firing multiple shots, killing four Marines and injuring one sailor. REUTERS/Damon J. Moritz/U.S. Navy/Handout via Reuters