" />" />

As many as one in 10 athletes may be using performance-enhancing drugs when the London Olympics kicks off this summer.

With a zero per cent increase in the budget for the World Anti-doping Agency (WADA) thanks to global austerity measures, the fight against newer, more advanced techniques has becoming increasingly difficult.

Al Jazeera's Lee Wellings reports from Lausanne, Switzerland.

Source: Al Jazeera