Rep. Michael McCaul: Concerned about Sochi Security

Russia is tightening its "ring of steel" around Sochi with just four days until the start of the Winter Olympics.

Another Russian warship is now on its way to Sochi. It will join an estimated 37,000 troops that already on the ground greeting scores of athletes, journalists and visitors.

Sochi 2014: Winter Olympic venues

But that manpower is doing little to ease concerns of a terrorist attack.

Welcome to Sochi, the security Games

The President of the International Olympic Committee was asked Monday about security and again stressed that he is confident the games will be safe.

"The Olympic stage is ready for the best winter athletes of the world," Thomas Bach said.

Congressman Michael McCaul, the Chairman of the Homeland Security Committee tells CNN's Erin Burnett that he's still concerned about security in Sochi.