Workers inspect body-skins produced for the new Boeing 767-400ER (extended range) airplane at Mitsubishi Heavy Industries, Nagoya, Japan. Mitsubishi will strengthen the body-skins by adding structural stiffeners. The resulting panel assemblies are used for the airplane section just aft of the wing. The skins showcase the more oval-shaped windows - a highly efficient design that Boeing first used on the 777 airplane. Incorporating the oval window design saves more than 500 pounds per airplane, compared to the earlier 767 design. The 767-400ER, which is 21 feet longer than the 767-300ER, is scheduled to roll out of the Boeing hangar in August 1999.