Chattanooga, Tennessee—Marine Corps veteran Joshua Blea pays his respects at a memorial to four Marines and a Navy seaman who were killed on July 16 when Kuwaiti-born gunman Mohammod Abdulazeez opened fire at a military recruiting station and a naval reserve facility. Police shot and killed the attacker, a 24-year-old naturalized U.S. citizen who grew up and went to college in Chattanooga. Authorities are treating the attack as an act of terrorism and investigating a trip Abdulazeez made to Jordan last year.