The International Olympic Committee president Jacques Rogge has said that he is hoping for the cleanest, most drug-free Olympics ever.

“Let me give them the message both to viewers and to the athletes,” Rogge said. “They must be persuaded that the IOC will do everything that is humanly possible to have the cleanest possible Games.”

Nearly half of the athletes will be tested for drugs.

“I believe that today we are very, very close to the cheats,” Rogge said. “I wouldn’t say level par, but very, very close to the cheats and far closer than we used to be a couple of years ago.”

Read more: Rogge vows ‘cleanest possible Games’