President Biden has said the US does not support an attack by Israel on Iran's nuclear sites, while the UN secretary general has warned of the danger of a regional war across the Middle East. We speak to expert on why diplomacy is crucial at this stage. Also in the programme: Biden visits Hurricane Helene-ravaged areas; and the discovery of an unknown species of moth. (Image: Smoke rises following an Israeli military strike in southern Lebanon. Credit: STR/EPA-EFE/REX/Shutterstock)