Is the Paris transport network up for an Olympic challenge?

An estimated 15 million people are expected to descend on Paris this July for the Olympic Games. The French government has promised that all spectators will be able to reach the sports venues via public transport. A new train line is also set to run from Orly, one of the city's key airports, out to the main Olympic sites. Not all Parisians are convinced that their transport network is up to the task, though. The World's Europe correspondent Orla Barry reports from Paris.