One Benefit Of Hosting The Olympics? More Medals

Great Britain has been raking in the medals at this summer's Olympics. Researcher Nigel Balmer of University College London says that's no coincidence. Balmer and his colleagues tracked Olympic medal counts going back to World War II and found that the host country routinely experiences a spike in the number of gold, silver and bronze medals its athletes take home. Audie Cornish talks to him about why that is.