An Air Self-Defense Force member stands guard as the ASDF demonstrates the training to utilize the PAC-3 surface to air interceptors at the U.S. Yokota Air Base in Fussa, on the outskirts of Tokyo, on Tuesday. | AP In an “unprecedented, grave and serious” threat, nuclear-armed North Korea test-fired a ballistic missile over Hokkaido on … Continue reading North Korea fires missile over Japan in sharp escalation of tensions By Jesse Johnson and Reiji Yoshida