Russia sochi bomb 120510

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Russian security services uncover plot to bomb 2014 Winter Olympics in Sochi

Chechen rebel leader Doku Umarov is said to have masterminded the plot.

Putin to Olympic officials: We're all set for Sochi 2014

Putin shows Olympic officials around Sochi.

Race technicians ski down a hill at the Rosa Khutor Mountain Resort in Krasnaya Polyana near Sochi on Feb. 18, 2012. The Games to be held there in 2014 will be the biggest international event hosted by Russia since the collapse of the Soviet Union

Olivier Morin

AFP/Getty Images