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The singer James Blunt tells John how he helped 'stop World War 3'. He says he refused an order to attack Russian troops while serving as a leading army officer with the allied forces in Kosovo in 1999.

Also on the programme, to coincide with Remembrance Sunday, General Sir Mike Jackson, a former commander of the British Army.

John's pundits are Allegra Stratton, a political correspondent at The Guardian, and David Wooding from the News of the World's political team. Guest MPs are Armed Forces Minister Nick Harvey and Labour's Gisela Stuart, MP for Birmingham Edgbaston, who's on the Defence Select Committee.