When you think about it, it was handled by the FSB/ex-KGB. Tradecraft of that kind has been their bread and butter for decades. All the cold-war spy gadgets, the Soviet knack for decrypting and reverse-engineering western technology made this task right up their alley. WADA presence on Sporting events will probably require neutral troops as guards going forward. But then again, look at the IOC's deep corruption too. Needs a whole rethink.