The prime minister did not know Lord Mandelson failed security vetting for the role of US ambassador until earlier this week, the government has said. We hear from the BBC's political editor and a Labour backbencher.

As a ceasefire between Lebanon and Israel comes into effect, we speak to our correspondent on the border between the two countries.

Also on the programme: A rare interview with a representative of the Russian government. And as the Pope criticises "tyrants" who spend billions on war, we look at the modern history of pacifism.