Tight security around Eurovision as event tries to stay apolitical

The semi-finals of the Eurovision Song Contest kicked off in Malmo, Sweden, last night. Thirty-seven countries are taking part this year and, as always with the contest, there were plenty of theatrics on stage from cows being milked to screaming witches. But behind the scenes, security is tight. The World's Europe correspondent Orla Barry reports on the political tensions organizers have been hoping to avoid.