Mick Wasco, energy program manager for Marine Corps Air Station Miramar, Calif., shows a Korean delegation the Primus Power battery during their visit aboard MCAS Miramar, Feb. 17. A Primus Power battery is a liquid battery used to store energy on the electric grid aboard the installation. The delegation consisted of 14 South Korean citizens and two American citizens. (U.S. Marine Corps photo by Cpl. Kimberlyn Adams/Released) - Mick Wasco, energy program manager for Marine Corps Air Station Miramar, Calif., shows a Korean delegation the Primus Power battery during their visit aboard MCAS Miramar, Feb. 17. A Primus Power battery is a liquid battery used to store energy on the electric grid aboard the installation. The delegation consisted of 14 South Korean citizens and two American citizens. (U.S. Marine Corps photo by Cpl. Kimberlyn Adams/Released)