As World War II drew to a close, nations across the planet scrambled to take stock, to recover, to rebuild and survive. But the looming spectre of nuclear technology continued to grow -- the US went against allies and enemies alike to keep its military edge. So how did countries traditionally considered enemies of the US gain nuclear technology? In many cases, the conspiracy goes down to a single man: AQ Khan. Terrified by what India's Smiling Buddha test might mean for the future of Pakistan, he worked furiously to get Pakistan the bomb -- and eventually began selling his expertise to the highest bidder.