While Justin Gatlin will allow to compete at the 2012 London Olympics, it is unclear whether Dwain Chambers will be permitted too

Two runners who have served bans desire to demonstrate that they have ability to win without intake of steroids. They are going to participate in the 2012 London Olympics. Justin Gatlin, an American sprinter, and the British runner Dwain Chambers want to display that they may win, competing clean.
They have already manifested that they are worthy to be called “Olympic champions”. While Justin Gatlin has obtained the gold medal, Dwain Chambers has won the bronze medal in the 60 meter sprint a1t the 2012 World Indoor Athletics Championship in Turkey.
The USA Track and Field and the US Olympic Committee invited Justin Gatlin to professional sports. These two agencies noted about their attitude to this sportsperson, supporting him.
When it comes to Dwain Chambers, it is unclear yet whether he will be permitted to compete at the Olympics. He wasn’t so supported, as Justin Gatlin was. Chambers experienced cold response from the British Olympic Association (BOA). Chamber’s comeback to sports induced the decision of the BOA to suspend athletes that have been caught administering steroids from the Olympics forever.
The World Anti-Doping Agency has warned the BOA that this rule violated the WADA laws related to forbidden medications. The BOA decided to fight against WADA and to prevent participation of Dwain Chambers for the United Kingdom in the Olympics. The BOA has taken the case to the Court of Arbitration for Sports (CAS).
so, while Gatlin was supported by the US Olympic Committee, Chambers’ case wasn’t pleasant.
Justin Gatlin has never acknowledged that he had administered steroids knowingly. But Chambers took the full responsibility for administration of steroids.
Gatlin tested positive for testosterone in April 2006. The world record of this athlete was annulled after the results of testing had been proclaimed. At the beginning this runner was suspended for 8 years. Later his suspension was reduced to 4 years due to cooperation with the USADA.
Gatlin didn’t admit that he had taken steroids knowingly. He blamed his masseuse for application of a testosterone cream during a massage.
On the contrary, Chambers admitted that he had administered steroids and taken the complete responsibility for the violation of steroid rules. He was banned for 2 years. This athlete forfeited all medals he won since 2002.
Different attitudes to these runners have manifested the difference between perceptions of athletes who have applied steroids by anti-doping officials in the USA and in the UK.