MONTREAL (AP) — The head of the World Anti-Doping Agency praised pre-Olympic drug testing programs that prevented a number of drug cheats from competing in Beijing.

WADA president John Fahey mentioned the United States by name as one of 20 nations that subjected its athletes to thorough tests before sending them to China.

"I think that in itself was very effective, and I do believe that the deterrent factor in the context of cheats wanting to take the risk was a very strong message that was out there," Fahey said following WADA's executive board meeting Saturday. "If you go back to those months leading up to the games a number of nations had a very vigorous program at home, and the USA was one, I know."

On the eve of the Olympics, IOC president Jacques Rogge estimated that there would be 30 to 40 positive drug tests in Beijing. As it turned out, there were only eight positive results during the games.