150401-N-ZZ999-025 OKINAWA, Japan Steelworker 2nd Class Juan Lopez, from Oxnard, Calif., assigned to Naval Mobile Construction Battalion 5, explains the design of the newspaper tower being built to a group of 1st grade students during a volunteer event at the Edward C. Killin Elementary School on Camp Foster, Okinawa. NMCB-5 Seabees volunteered to assist and support the school with their Science, Technology, Engineering and Math program.