Joe Biden has faced ongoing questions surrounding his ability to carry on as president, after his recent debate performance. Now, he's written to Democratic lawmakers, calling for unity and reassuring them he has the ability to run against Donald Trump. Also on this podcast: NATO condemns a Russian airstrike on a children's hospital in Kyiv, a Kenyan doomsday cult leader goes on trial, plane-maker Boeing faces more safety concerns, and a painting in Sydney depicting Jesus as a cartoon character causes a stir.