On the morning of July 16, 2015, Muhammad Youssef Abdulazeez conducted a drive-by shooting at the Armed Forces Career Center on Lee Highway in Chattanooga, Tennessee, firing 30 to 45 rounds from an AK-47 into the recruiting office from his rental car and wounding a U.S. Marine. Only seven people were inside the center at the time. Abdulazeez then led police on a seven-mile pursuit to a U.S. Navy Reserve center on Amnicola Highway, where he rammed his vehicle through a security gate, opened fire, and entered a building housing Marine Corps and Navy personnel, fatally wounding a Navy sailor. He then moved into a fenced motor pool area and shot several Marines before briefly reentering the building and firing on responding police officers. Five Chattanooga police officers—Keven Flanagan, Jeff Lancaster, Sean O'Brien, Lucas Timmons, and Grover Wilson III—fatally shot Abdulazeez outside the facility. The entire episode spanned about thirty minutes, during which Abdulazeez fired approximately 100 rounds.
Four U.S. Marines died at the scene, and the wounded Navy sailor died two days later at a hospital. Victims were reported to have returned fire, provided cover, and helped others escape over a fence during the attack. Two additional people were wounded: Marine recruiter Sergeant DeMonte Cheeley, shot in the leg, and police Sergeant Dennis Pedigo Jr., shot in the ankle. Investigators later examined whether firearms carried by a slain Marine and by the reserve center's commanding officer had been used against Abdulazeez.
Abdulazeez, born in Kuwait in 1990 to Palestinian-Jordanian parents, moved to the United States in 1996 and became a citizen in 2003. He graduated from the University of Tennessee at Chattanooga with an electrical engineering degree and had worked briefly at a nuclear power station before being dismissed after failing a drug test. He struggled with substance abuse, depression, and debt, and had been arrested for DUI in April 2015. Writings recovered after the shooting, some dating to 2013, referenced suicidal thoughts and a desire to become a martyr, and he had downloaded material by al-Qaeda figure Anwar al-Awlaki. No specific attack plan or explicit motive was found in his writings.
The FBI investigated the shootings as an act of terrorism from the outset. On December 16, 2015, then-FBI Director James Comey stated the investigation concluded Abdulazeez was "inspired, motivated by foreign terrorist organization propaganda," though the specific group could not be identified. The Navy subsequently awarded the Purple Heart to the victims. The attack prompted a range of security reviews and policy changes, including a Defense Department memorandum on facility security, a Navy investigation into base protections, and state-level decisions in Tennessee and other states regarding armed personnel at military and National Guard facilities.
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