The McDonnell F-101 Voodoo is a supersonic fighter jet in service with the United States Air Force (USAF) and the Royal Canadian Air Force (RCAF).Originally designed by the McDonnell Aircraft Corporation as a long-range bomber escort (known as a penetration fighter) for the USAF Strategic Air Command (SAC), the Voodoo was instead developed as a nuclear-armed fighter-bomber for the USAF Tactical Air Command (TAC), and as a photo reconnaissance aircraft based on the same fuselage. An F-101A set a number of world speed records for jet-powered aircraft, including the fastest airspeed, reaching 1,207.6 miles (1,943.4 km) per hour on December 12, 1957. [1] They operated in a reconnaissance role until 1979.The delay of the interceptor project in 1954 led to demands for the design of a temporary interceptor aircraft, a role which the Voodoo B model eventually won. This required extensive modifications to add a large radar to the nose of the plane, a second crew member to operate it, and a new weapons bay using revolving doors that housed four AIM-4 Falcon missiles or two AIR-2 Genie rockets. in the fuselage until it is time to fire. The F-101B entered service with the USAF Air Defense Command in 1959 and the Royal Canadian Air Force in 1961. The US examples were handed over to the USAF Air National Guard where they served until 1982. The Canadian examples remained in service until 1984.