David Reynolds is a Professor of International History at Cambridge University, and a Fellow of Christ's College. He was awarded the Wolfson Prize for History, 2004, and elected a Fellow of the British Academy in 2005. He has written and presented several history films for the BBC - among them the 2008 series Summits. His books include several on modern America and its relations with Europe. His fascination with the country dates back to a year living there as a student, culminating in an epic ten-week, 10,000 mile bus journey in the summer of 1974 which ended outside the White House on the morning Richard Nixon resigned. David has been a regular visitor to the United States ever since and has held visiting university appointments at Harvard, Nebraska and Oklahoma. America, Empire of Liberty, his book linked to the BBC Radio 4 series, was published by Penguin in 2009.