Another concern is security. This will be Britain's biggest peacetime security operation ever. The security budget has doubled to $882 million. In a late addition, the Ministry of Defense is providing 13,500 soldiers for the Games. David Rubens is a security consultant specializing in the Olympics. "It's very difficult to maintain the balance between an open and welcoming event and security management. It's different from what happened in Vancouver, it's certainly different from what happened in Beijing. And the people responsible will certainly be lying awake at night trying to wonder whether they've got that balance right, and the answer is, if it goes wrong, then you got it wrong." Terrorists are not the only concern. A protester recently halted the historic rowing race between Oxford and Cambridge universities along the River Thames. Trenton Oldfield swam in front of Oxford's boat, forcing the race to be restarted. He said he did it as a protest against what he called "elitist society." His actions led the chief of the British Olympic Association to warn that it would take "just one idiot" to ruin the Summer Olympics. The next Olympics are the 2014 Winter Games in Sochi, Russia. Then come the 2016 Summer Games in Rio de Janeiro. But first Brazil will hold another of the world's major sporting events: the 2014 World Cup finals.