On October 4, 1957, Avro Canada revealed the CF-105 Arrow, a cutting-edge supersonic interceptor, to the press and military officials at an airfield in Malton, Ontario. Designed to reach speeds of Mach 1.9—over 1,300 miles per hour—it was one of the fastest jet fighters of its era. Flight testing began in March 1958 with the first prototype, the RL-201, which quickly proved its capabilities, hitting Mach 1.9 in level flight and Mach 1.95 in a dive. Despite its promising performance, the Canadian government abruptly canceled the program on February 20, 1959, opting instead to invest in surface-to-air missiles like the Bomarc, which were seen as a more cost-effective alternative to manned fighters. All five completed Arrow aircraft were destroyed, their parts sold as scrap metal on government orders. The CF-105 Arrow was a marvel of engineering, featuring advanced systems such as a 4,000 psi hydraulic system, a basic electric flight control system with artificial force feedback, and the use of high-strength materials like titanium and magnesium. It was powered by the Orenda Iroquois engine, which had been tested in a modified B-47 bomber. The cancellation came suddenly, with no prior warning or negotiation. The president of Avro Canada, Crawford Gordon, announced the decision over the plant’s public address system. The abrupt end of the program led to the destruction of all blueprints, tools, and completed fuselages, wiping out 14,525 direct jobs and contributing to a total of nearly 60,000 job losses across the supply chain. The government justified the decision by citing cost concerns. Prime Minister John Diefenbaker claimed that the $1.1 billion price tag of the Arrow program could be better spent on missiles like the Bomarc, which were expected to be more economical. However, the Bomarc later faced operational problems, and manned interceptors continued to be used by Western air forces for decades. The decision was also influenced by international pressures to purchase American military equipment rather than support a Canadian program that was seen as too independent. Despite its cancellation, the Arrow's legacy lived on. Jim Chamberlin, a lead Avro engineer, helped form a group of 25 engineers who later joined NASA’s Space Task Group, contributing to the Apollo lunar module and other space projects. Engineers like Owen Maynard and John Hodge also played vital roles in NASA’s Mercury and Gemini programs. The Arrow’s innovations, particularly in electric flight controls and high-pressure hydraulic systems, were directly applied to the space program that eventually sent humans to the Moon. The decision to cancel the Arrow was also influenced by concerns about espionage. Canadian authorities suspected a Soviet mole within Avro, partly due to a visit by a group of Soviet scientists and engineers to the Avro plant in October 1958. While this fear was cited as a reason for the program’s cancellation, no public evidence of espionage has ever been found. The Arrow’s story remains a complex chapter in Canadian history, blending technological ambition, political decisions, and unintended consequences that reached far beyond the skies of Canada.