US Navy (USN) Construction Mechanic Second Class (CM2) Albert Johnson assists members of the Naval Mobile Construction Battalion 4 (NMCB-4) with their 5.56 mm M16A2 rifles during weapons qualifications training at US Marine Corps Base (MCB) Camp Hansen, Okinawa, Japan (JPN). NMCB-4 is currently onboard Camp Shields also located in Okinawa for a scheduled six-month deployment in the Pacific Region