america's clayton murphy tries to defend his bronze and maybe go even better >> and clayton murphy isever matters for him. when he's in a big meet, he saves his best running if he positions himself well, he can create history here tonight. >> so korir looks like he is going to handle -- >> whoa. >> whoa, the pushing has begun korir is in the lead >> boll of australia ferguson rotich on the outside nijel amos knot enjoying himself there and he's letting the competitors now he's not going to be pushed around. >> you have to assert yourself and make yourself run so that no mishaps happen >> here comes dobek in the white and red. one lap to go. 400 meters between these men and a gold medal who is going to get it >> extremely slowly, almost 54 seconds. this is going to turn into a kicker's race. everybody's still in it. >> clayton murphy, second from last he's back there with amel tuka work to do as they go up the backstretch. >> but a slow pace is in his favor. he's a kicker. even though he looks like he's way off the pace right here, you wait to see him in the final 150 meters of this ra