Tensions ramp up in the Middle East after Hamas killing

Iran has vowed to avenge the killing of Hamas’s political leader Ismail Haniyeh who died in an overnight air strike in Tehran. Israel hasn’t commented publicly on the strike but it has previously vowed to eliminate the group’s leaders. What does this mean for the already volatile situation in the Middle East? Stuff's Catrin Owen has been covering the murder trial of eye surgeon Philip Polkinghorne. She brings us up to speed with the latest developments. New research has found nearly half of dementia cases could be delayed through lifestyle changes. What you can do to minimise the risks. And speaking of lifestyle changes, Imogen Wells checks in from New Zealand House on the world famous Champs-Élysées. Warning: The details of the Polkinghorne case may be upsetting for some listeners.