The McDonnell F-101 Voodoo was a supersonic jet fighter which served the U.S. Air Force and the Royal Canadian Air Force. Some F-101Bs were completed as dual-control operational trainer aircraft initially dubbed TF-101B, but later redesignated F-101F. Seventy-nine new-build F-101Fs were manufactured, and 152 more existing aircraft were later modified with dual controls. Ten of these were supplied to Canada under the designation CF-101F.