How Big is Australia's Terrorism Threat?

We head to Australia, less than three months after the Sydney siege, which gripped the country and the rest of the world. The BBC's Jon Donnison presents from a venue overlooking Sydney harbour. He is just a few minutes away from a café where 17 people were taken hostage by a lone gunman. Since then, Australia has been ramping up its anti-terror laws. Are these necessary measures or is it just the government talking up the fear factor? We hear from a group of Australians in Sydney.

(Photo: Police holds a female hostage. Credit: Reuters)