U.S. Marines shoot their M16 rifles during a live-fire exercise Feb. 4 on the flight deck of the USS Bonhomme Richard. Each Marine fired 30 rounds during multiple drills. The Marines are with Combat Logistics Battalion 31, 31st Marine Expeditionary Unit, and are currently underway as part of the regularly scheduled Spring Patrol of the Asia-Pacific region. (U.S. Marine Corps photo by Lance Cpl. Ryan C. Mains/Released) - U.S. Marines shoot their M16 rifles during a live-fire exercise Feb. 4 on the flight deck of the USS Bonhomme Richard. Each Marine fired 30 rounds during multiple drills. The Marines are with Combat Logistics Battalion 31, 31st Marine Expeditionary Unit, and are currently underway as part of the regularly scheduled Spring Patrol of the Asia-Pacific region. (U.S. Marine Corps photo by Lance Cpl. Ryan C. Mains/Released)