The Federal Aviation Administration has refused to certify the commercial 767 aircraft modified by Boeing into an aerial refueling tanker for the Japan Air Self Defense Force to carry cargo, passengers or fly long-distance missions, according to FAA documents. Due to be delivered to Japan in late February, the lead-KC-767 aircraft in a four-aircraft deal remains at a Boeing aircraft facility in Wichita, KS -- in a limbo of sorts with Japanese officials insisting on a safety certification and Boeing...