After 41 years, South Korea is retiring the last of its 222 F-4D Phantom fighter-bombers. They (and F-5 fighters) have been replaced, over the last 15 years, by 40 F-15K fighter-bombers and 180 F-16s. The F-4 was a 28 ton, two seat, fighter bomber designed in the 1950s, and about 5,200 were built, mostly in the 1960s and 70s. About ten percent of them are still in service. Replacing the F-4 as a fighter-bomber is the F-15K, which is a customized version of the 36 ton U.S. F-15E (a two seat fighter bomber version of the single seat, 31 ton...