Olympic medals from Clement Chukwu

The USA came first in 2: 56.35, over 2 seconds ahead of Nigeria. In doping control, Antonio Pettigrew tested positive for EPO and growth hormone. That's why the US squadron was diqualized. The following nations moved up a rank, Nigeria was awarded the Olympic gold medal. So the world record holder Michael Johnson lost one of his gold medals. Antonio Pettigrew was coached by Trevor Graham who also provided doping agent to Marion Jones. In addition to Pettigrew and Jones other athletes were involved in the BALCO affair.