Record numbers of drugs tests will be carried out at the London 2012 Olympics, it has been announced.
The London Organising Committee (Locog) will carry out around 5,000 tests under the authority of the International Olympic Committee.
That is 10% more than were conducted in Beijing in 2008, where 20 of the samples taken returned positive tests.
news.bbc.co.uk
London 2012 director of sport Debbie Jevans says the size of the testing program will give a "strong message that drug cheats are not welcome at the London Games."