Big Bad Wolf Bedtime Story

Donald Trump's National Security Adviser says the president in no way compromised any sources or methods in a meeting with Russia's foreign minister last week. H R McMaster defended Mr Trump's conversation with Sergei Lavrov as "wholly appropriate". So what is a US president allowed to share? Also on the programme: A Mexican activist searching for his missing daughter fears for his life; and scientific cooperation in the Middle East. (Image: H R McMaster speaks during a briefing at the White House. Credit: AFP/Saul Loeb)