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Diplomats from Israel and Lebanon have been meeting in Washington for a fourth round of talks as Israeli forces continued to carry out strikes in southern Lebanon. We speak to a member of the Iran-backed armed group Hezbollah on why it has no plans to give up its weapons. Also in the programme: As the head of the UN gives a stark warning about the most catastrophic El Ni帽o yet, farmers around the world remind us what's at stake; and the meaning of new research into the magnetic fields of planets beyond our solar system.

(Photo: Destroyed buildings after an Israeli airstrike that targeted the city of Tyre, Lebanon. Credit: WAEL HAMZEH/EPA/Shutterstock)