U.S. F-15 fighter jets resumed their flight training operations Wednesday, just two days after an F-15 crashed into the sea off Okinawa and the subsequent suspension of training, the Defense Ministry said.Two F-15 fighters took off from the U.S. Kadena Air Base in Okinawa Prefecture at around 7:50 a.m., followed by several others shortly afterward. The prefectural government has reacted against the resumption of flights, saying it has received no explanation about the cause of the crash.An F-15 jet crashed at around 6:25 a.m. on Monday about 80 kilometers south of Naha, the prefectural capi…READ FULL ARTICLE