With less than a month to go before the Winter Games, Russian officials are putting the finishing touches on what they say will be the tightest Olympic security in history.
After a spate of deadly terrorist attacks in the region, the authorities are deploying high-tech surveillance equipment and tens of thousands of troops in Sochi, the host city on the Black Sea.
Sochi is unique among the cities hosting the Winter Games because it has the mild climate of a seaside resort, but it's less than an hour away from the snow-capped mountains of the North Caucasus.
But the mountain region is als