From Our Own Correspondent

Around the world in less than half an hour! Today: a four-day trek through the remotest parts of Argentina in search of an old man who might have a story to tell; communal activities finally return to the agenda in Liberia now the fear of Ebola is fading; the Israeli prime minister's about to address the joint Houses of Congress in Washington - the White House is not enthusiastic; a journey underground in the Iranian capital Tehran - it provides a picture of Iranian society most tourists will never see and as American and Cuban representatives resume diplomatic negotiations, there's hope in Havana it might all result in better menus!