In the post-Second World War period, the Soviet Union began developing a fleet of long-range bombers capable of delivering nuclear weapons to North America and Europe. To counter this threat, Western countries developed interceptor aircraft that could engage and destroy these bombers before they reached their targets. The Avro CF-105 Arrow was a delta wing interceptor aircraft, designed and built by Avro Aircraft Limited (Canada) in Malton, Ontario, Canada, as the culmination of a design study that began in 1953. A. V. Roe Canada Limited had been set up as a subsidiary of the Hawker Siddeley Group in 1945, initially handling repair and maintenance work for aircraft at Malton, Ontario Airport (today known as Pearson International Airport, Toronto's main airport). The next year the company began the design of Canada's first jet fighter for the Royal Canadian Air Force, the Avro CF-100 Canuck all-weather interceptor. Avro engineering had been considering supersonic developments for some time at this point. German research during the Second World War had identified a number of solutions to the problems associated with supersonic flight. It was known that the onset of wave drag was greatly reduced by using thinner airfoils with much longer chord, but these airfoils were impractical because they left little internal room in the wing for armament or fuel. Instead, aerodynamicists employed a swept-wing design to "trick" the airflow into behaving as though it was flowing over a long, thin wing. Almost every fighter project in the postwar era immediately applied the concept, which started appearing on production fighters in the late 1940s. Canada tried to sell the Arrow aircraft to the U.S. and Britain, but had no takers. The aircraft industry in both countries, was and still is considered a national interest, and buying foreign designs, no matter how worthy, remains rare. Although nearly everything connected to the CF-105 and Orenda Iroquois programs was destroyed, the cockpit and nose gear of RL-206, the first Mk 2 Arrow, and two outer panels of RL-203's wings were saved and are on display at the Canada Aviations Museum in Ottawa, alongside an Iroquois engine.