The Caucasus Emirate
Doku Umarov, the most wanted Chechen terrorist in Russia, has made a direct threat against the 2014 Winter Olympic Games, which are to be held in Sochi on the Black Sea, an area once known as Circassia. The tribes that lived there were Muslim, but 600,000 were slaughtered and the rest were driven out around the time of the U.S. Civil War.
The Caucasus Emirate is both the group seeking to create an independent Islamic state and the name they seek to use for the state itself. Note Sochi itself, at the center on the left edge of the map.