Gunnery Sgt. Antonio Lopez, right, instructs Petty Officer 3rd Class Andrew Dowling on roadway measurement calculations July 14 at Camp Foster as part of the Traffic Collision Investigation Course. The day of practical application training took the service members out of the classroom and onto the streets. The hands-on training familiarized the service members with what to look for when at the scene of an accident. Lopez is a Calipatria, California, native and an accident investigator with the Marine Detachment at Lackland Air Base, Training Command, Training and Education Command. Dowling is a Norton, Ohio, native and master-at-arms 3 with Commander Fleet Activities Okinawa Security. (U.S. Marine Corps photo by Lance Cpl. Wes J. Lucko/Released) - Gunnery Sgt. Antonio Lopez, right, instructs Petty Officer 3rd Class Andrew Dowling on roadway measurement calculations July 14 at Camp Foster as part of the Traffic Collision Investigation Course. The day of practical application training took the service members out of the classroom and onto the streets. The hands-on training familiarized the service members with what to look for when at the scene of an accident. Lopez is a Calipatria, California, native and an accident investigator with the Marine Detachment at Lackland Air Base, Training Command, Training and Education Command. Dowling is a Norton, Ohio, native and master-at-arms 3 with Commander Fleet Activities Okinawa Security. (U.S. Marine Corps photo by Lance Cpl. Wes J. Lucko/Released)