The Federal Aviation Administration investigated sightings by a Japanese air crew flying a jumbo jet over Alaska in November, 1986. The FAA could not explain the visual sightings by the crew of two very unusual lighted objects which held station ahead of the jet for many minutes before moving to the left and then behind. Occasionally Elmendorf AFB radar detected a non-identifiable target in the vicinity of the jet. The weather radar on the jet also detected a large target.