Moscow's Luzhniki Stadium is the venue for the Fifa World Cup final in 2018 - at least it is if Russia retains its status as host nation to the world's biggest sporting event. The decision to award the next two World Cups to Russia then Qatar is now being investigated by the authorities in Switzerland and the US. Stephen Sackur asks the chief of Russia's World Cup organising committee, Alexei Sorokin, what are the odds on the World Cup actually making it to Moscow?