Are the Sochi Winter Olympics Safe Enough?

In a couple week the 22nd winter Olympics will get underway in Sochi, Russia. Athletes from 85 countries and  spectators from around the world will attend the games and the Paralympics to follow. Russia will deploy massive security to prevent acts of terrorism. But given the location in a known hot spot for dissent and terrorism, will Russia be able to offer 100% protection to participants and guests?  Is it possible to prevent terrorism and have an open and enjoyable games? Post your comments below.