Funny, how so many Americans accuse the Polish guys of doping when it is the US that had the most doping cases in the 400m in recent years: Antonio Pettigrew, Alvin Harrison, Calvin Harrison, Butch Reynolds, LaShawn Merritt, Jerome Young, to name a few. Poland on the other hand had none. Also, the splits the Poles ran weren't all that extraordinary plus the 4x4 indoor record was pretty weak anyway – college kids come close to it every year. Lastly, if you listen to the US squad interview after the heats on IAAF YT channel, they were extremely arrogant. They clearly thought this would be a walk in the park for them and got punished.