Frank Shorter is not bitter, but he did get jacked out of gold medal because the East German who "won" was using drugs in 1976. Bob Schul was the best runner in the world in 1964 and there's absolutely no reason he couldn't run 1.5 seconds/lap faster x 12.5 laps. That would put him in 13:08 range easily.
Greg Lemond also never failed a drug test and there is no evidence to suggest that he did. Carl Lewis never failed a drug test for a PED.
You seriously need to get your facts straight, buddy.