Twelve presidents and one legendary photographer. Alex Salmond speaks to Harry Benson who has captured the image of every American president since Dwight D. Eisenhower. Granted unrivaled access to the White House, he has portrayed Nixon on the point of resignation, the Reagans dancing and the Clintons in love. Benson’s extraordinary portfolio of the great and the bad tells the story of our times. Benson tells Alex about the president he liked the most, which he liked the least, and which one is his all-time favorite photo.