Impossible, no way on earth!!!
American men like Hocker and Nuguse are not the distance legends we saw in Hicham El G, Noah Ngeny, Daniel Komen, Haile Geb, Noreddine Morceli and why???
I don't only look at time performances, I look at BIOMECHANICS!!!!!!!!!!!!!!!!!!!!!!!!!
Hocker and Nuguse run like little midgets with that weird-ass, effeminate pigmy-like or otherwise arm swing. It's not classy, it's not elegant, it's not super-conducting, it's not effortless and resistance-less to the objective eye and senses. Look how smooth Noah Ngeny and Hicham El G carries their legs and arms, ON LOUSY SHOES AND BAD TRACK SURFACES NO LESS!!!!!!!!!!!!!!!!!!!!!!!!!
So it's not just the end result but the manner in which the result was achieved and realized, and the manner in which a runner runs such as his biomechanics is just as important if not more so than the results!!! The laws of Physics must approve of a runner's biomechanics!!