claim: Ed and Lorraine Warren investigated the paranormal.
evidence: The Avro Canada CF-105 Arrow , often known simply as the Avro Arrow , was a delta-winged interceptor aircraft designed and built by Avro Canada .. interceptor aircraft. interceptor aircraft. Avro Canada. Avro Canada. The Arrow is considered to have been an advanced technical and aerodynamic achievement for the Canadian aviation industry .. The CF-105 -LRB- Mark 2 -RRB- held the promise of near-Mach 2 speeds at altitudes of 50000 feet and was intended to serve as the Royal Canadian Air Force 's -LRB- RCAF -RRB- primary interceptor in the 1960s and beyond .. Mach. Mach number. Royal Canadian Air Force. Royal Canadian Air Force. However , Canada tried to sell the Arrow to the U.S. and Britain , but had no takers .. The aircraft industry in both countries was considered a national interest and the purchase of foreign designs was rare .. The Arrow was the culmination of a series of design studies begun in 1953 examining improved versions of the Avro Canada CF-100 Canuck .. Avro Canada. Avro Canada. Avro Canada CF-100 Canuck. Avro Canada CF-100 Canuck. After considerable study , the RCAF selected a dramatically more powerful design , and serious development began in March 1955 .. The aircraft was intended to be built directly from the production line , skipping the traditional hand-built prototype phase .. The first Arrow Mk .. I , RL-201 , was rolled out to the public on 4 October 1957 , the same day as the launch of Sputnik I.. Sputnik I. Sputnik I. Flight testing began with RL-201 on 25 March 1958 , and the design quickly demonstrated excellent handling and overall performance , reaching Mach 1.9 in level flight .. Mach. Mach number. Powered by the Pratt & Whitney J75 , another three Mk .. Pratt & Whitney J75. Pratt & Whitney J75. 1s were completed , RL-202 through -204 .. The lighter and more powerful Orenda Iroquois engine was soon ready for testing , and the first Mk.II with the Iroquois , RL-206 , was ready for taxi testing in preparation for flight and acceptance tests by RCAF pilots by early 1959 .. Orenda Iroquois. Orenda Iroquois. On 20 February 1959 , the development of the Arrow -LRB- and its Iroquois engines -RRB- was abruptly halted before a planned project review had taken place .. Two months later , the assembly line , tooling , plans and existing airframes and engines were ordered to be destroyed .. The cancellation was the topic of considerable political controversy at the time , and the subsequent destruction of the aircraft in production remains a topic for debate among historians and industry pundits .. `` This action effectively put Avro out of business and its highly skilled engineering and production personnel scattered ... ''