Nobel prize for medicine winners' delight at news of award – video

The joint winner of the Nobel prize for medicine John O' Keffe says the award is a great honour for himself and the field of neuroscience. Anglo-American John O'Keefe shares the award with Norwegian couple May-Britt Moser and Edvard Moser for discovering the brain's internal positioning system. At a party in Norway arranged shortly after the announcement, scientist May-Britt Moser celebrates