Mr. Putin has said,“The job of the Olympics host is to assure security of the participants in the Olympics and visitors. We will do whatever it takes.”
In recent weeks, Mr. Putin has conducted large special operations sweeps of known militant areas.
Mr. Putin has also set up a ‘ring of steel’ around Sochi as an added precaution.
Professor Mark Galeotti, a security expert at New York University said the thousand-mile Moscow to Adler railway line is vulnerable to a strike by extremists.
He said the route is “an obvious target” as it would be outside Sochi’s ‘ring of steel’ and be consistent with the tactics of previous terror attacks.
An attack during the Games is “inevitable.”