Peter Higgs: Scotland's Nobel Winner

On December 10 2013, the Edinburgh-based Peter Higgs receives the Nobel Prize for Physics, 50 years after he predicted the existence of a sub-atomic particle which gives mass to all the matter in the universe. BBC Scotland's Science Correspondent Kenneth Macdonald tells the story of how this modest 84-year-old became a physics superstar, and speaks to those who have awarded the prize.