(AP) — In this photo taken on Monday, Jan. 17, 2011, pigs squeal at a pig farm in Beijing, China.
Anti-doping scientists, coaches and others in sports fear that bad food could cause innocent athletes to fail anti-doping drug tests. With China, in particular, scientists fear that a rash of drug-test failures could be linked to the illegal use in livestock farming of the banned drug clenbuterol. The Chinese nickname for the drug is "lean meat powder" and it is used to bulk up pigs and other farm animals. (AP Photo/Ng Han Guan)