Winter Olympics security stepped up at Sochi, Russia
In Russia there is concern that terrorists could be planning to attack the 2014 Winter Olympics, to be held in Sochi.
A senior Russian official has told the BBC he expects "terrorist activity" to increase in the country ahead of the Games, and that Russia's secret services had uncovered terror plots.
Steve Rosenberg looks at the security arrangements being set up in Sochi.
22 Feb 2011
- From the section Europe