Best of the Week - 19 December 2014

Highlights from Radio New Zealand National's programmes for the week ending Friday 19 December. This week.....insights into how and why the Sydney seige happened; alone on air - when a guest walks out of an interview; from whale killers to whale counters - the end to whale hunts in NZ; Marcus du Sautoy on the symmetry of maths; testing IQ on robins; farming food at school; milking the community cow benefits everyone; cooking slow food with no power and no smoke; and RZA on herding members of the Wu Tang Clan for a 20th anniversary album release