From the BBC World Service: Turkish President Recep Tayyip Erdoğan’s main political rival — Ekrem İmamoğlu, the mayor of Istanbul — was due to be named as a nominee for the 2028 presidential election. Now, tens of thousands are protesting his detention on corruption charges as Turkey’s economic struggles continue. We’ll learn more about the situation. Also: Could tariffs under U.S. President Donald Trump provide an opportunity for Chile’s salmon farmers?