Science: How oxygen gets into wine bottles

Science commentator Allan Blackman joins Kathryn to discuss a study which looked at how oxygen sneaks into wine bottles, even when they're corked - does it really matter though? He'll also talk about a deeply flawed World War II asbestos report that the researchers never retracted - what impact has that had. And the US President keeps talking about "destroying" Iran's uranium stores - but how easy is that to do, really?