A luxury SUV is parked outside the Cocos Prive club in Chisinau, Moldova. On the terrace of this exclusive dance club and sushi bar in February 2015, Valentin Grossu made his pitch to a client: 2.5 million euros (USD $2.8 million) for enough radioactive cesium to contaminate several city blocks. It was one of at least four attempts in five years in which criminal networks with suspected Russian ties sought to sell radioactive material to extremists through this former Soviet country. (AP)