A U.S. F-15 fighter jet crashed into the sea off Okinawa on Monday morning, with the pilot picked up by a search-and-rescue crew from Japan's Air Self-Defense Force, the U.S. military and local defense bureau said.The F-15, belonging to the U.S. Kadena Air Base, crashed at around 6:25 a.m. about 80 kilometers south of Naha, the prefectural capital of Okinawa, during training, they said.The pilot has been transferred to a hospital and is in "serious condition," the U.S. Air Force in Kadena said.The latest crash adds to a slew of other accidents involving U.S. military aircraft in recent year…READ FULL ARTICLE