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06:00 GMT  Stopping Olympic drug cheats  Sonali in the lab where
athletes' wee samples are tested for drugs  Thousands of top
athletes from all over the world will be going for gold at the
Olympic Games in Beijing this summer.  Competition in the 28
different sports is so tough that some competitors take drugs to
make themselves faster or stronger, in their bid to win.
Newsround's Olympics reporter Sonali has been finding out what's
being done to stop the cheats and try to keep the Games drug-
free.  Canadian sprinter Ben Johnson was the first big star to
be caught using drugs.  American sprinter Marion Jones American
sprinter Marion Jones He used them at the Seoul Olympics in
1988, but since then loads more athletes have cheated their way
to world records or Olympic medals.  American sprinter Marion
Jones won five medals at the Sydney Games in 2000, but had to
give them all back after admitting taking drugs.  And there were
plenty more in Athens,