In this photo taken Tuesday, May 21, 2013 police officers check documents while patrolling in the Black Sea resort of Sochi, southern Russia. Police, security and medical personnel in S

 

              In this photo taken Tuesday, May 21, 2013 police officers check documents while patrolling in the Black Sea resort of Sochi, southern Russia. Police, security and medical personnel in S
In this photo taken Tuesday, May 21, 2013 police officers check documents while patrolling in the Black Sea resort of Sochi, southern Russia. Police, security and medical personnel in Sochi have conducted dozens of drills to train for potential threats. Drones hovering overhead, robotic vehicles roaming Olympic venues to search for explosives, high-speed patrol boats sweeping the Black Sea coast _ Russian officials say they will be using cutting-edge technology to make sure the 2014 Winter Games in Sochi will be “the safest Olympics in history." (AP Photo/Artur Lebedev)