Getting ready to open 'Fortress Australia'

Lowering the drawbridge on 'Fortress Australia' is shaping up to be a logistical nightmare. According to an estimate in last week's federal budget, the process could begin by the middle of next year. But there's a lot of work to do before then. So will we be ready in time? And what's still standing in our way? Featured: Professor Catherine Bennett, Chair in Epidemiology, Deakin University