The Republic F-105 Thunderchief, aka the "Thud" by its crews, was part of the 100 series fighter aircraft built during the 1950's by different manufacturers and the F-105 was a Mach 2, 23-ton single seat fighter which served in the US Air Force from 1958 through 1984, so it was retired 40 years ago. It was originally designed as a Fighter/Bomber, which was a new concept at the time, and it could carry tactical nuclear weapons to supplement the strategic bombers if necessary. It was extensively used during the Vietnam War to suppress enemy air defense systems but when it was retired, it was the F-4G Phantom which took over its job.