Extra Time for 20 July 2012

In Extra Time this week, we have an Olympic focus ahead of the London Games beginning next week. We hear from New Zealand Chef de Mission Dave Currie and Bike New Zealand's high performance manager Mark Elliot. The Waikato-Bay of Plenty Magic hope its third time lucky when they contest the final of netball's trans Tasman competition in Melbourne, this weekend. And we try and learn a few design secrets about Team New Zealand's America's Cup catamaran.