High-level delegates from the US and Iran are in Oman for talks about Iran's nuclear programme. We'll hear a view from Tehran. Also on the programme: after a week of uncertainty over Donald Trump's tariffs, we hear how the Ancient Romans used a similar policy; and in the Colombian city of Medellín, an unusual reminder to put out your garbage.

(Photo: Iran's President Masoud Pezeshkian visits Iran's nuclear achievements exhibition in Tehran, Iran on April 9, 2025. Credit: REUTERS)