Airbus Industrie arrived at the show to promote their A300, claiming that the longer-ranged A-300B-4 variant would present strong competition in the U.S. domestic market due to operating costs being 5 to 7% lower than the L-1011 and DC-10 trijets. Noting that the original contract that led to the trijets had called for a twin-engine aircraft, Ken Gordon of Airbus North America claimed that the original specification still needed to be filled. The third engine of the US designs gave them the ETOPS performance needed for trans-Atlantic flights, but were unneeded for flights within North America, which the 300 could meet with lower operational costs. Douglas and Lockheed responded by using the show to pitch two-engine versions of their three-engine designs to compete with the A300.