Bomb dropped by U.S. in World War II explodes at airport in Japan, causing runway damage and cancellation of 80 flights CBS NewsBuried US second world war bomb explodes at Japanese airport The GuardianSuspected WWII bomb grounds Japanese airport Al Jazeera EnglishA US bomb from World War II explodes at a Japanese airport, causing a large crater in a taxiway The Associated PressRunway closed at Japan airport after dud shell explodes on taxiway Kyodo News Plus