Missile defence systems in the Pacific The U.S. and its Pacific allies could intercept North Korean missiles launched in the direction of Guam, but much of the technology is yet to be battle-tested and experts say there is no guarantee it will work Possible launch site SOUTH KOREA CHINA NORTH KOREA JAPAN Japanese Navy destroyers Shimane, Hiroshima, Ehime and Koichi prefectures ALASKA (U.S.) Fort Greely CANADA U.S. Vandenberg, California Hwasong-12 range 4,800km Guam: U.S. territory and military base U.S. destroyers along missile flight path PACIFIC OCEAN Aegis: Ship-based SM-3 interceptors engage enemy missile in midcourse phase, above Earth’s atmosphere Patriot: Short-range PAC-3 system can shoot down slower missiles in final phase of flight THAAD*: Radar could track hostile missile launch. Interception occurs as missile re-enters atmosphere Ground-based Midcourse Defense (GMD): Total of 36 interceptors designed to protect U.S. mainland Hwasong-12: North Korea planning to fire four intermediate-range ballistic missiles to splash into ocean about 30-40km from Guam Sources: Missile Defence Agency, NYT *Terminal High Altitude Area Defense © GRAPHIC NEWS