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David Kilcullen, chief strategist in the Office of the Coordinator for Counter-terrorism between 2005 and 2006, on the West's counter-terrorism strategy; Former Republican governor of New Jersey, Christine Todd Whitman, on the Republican plan to stop Donald Trump; The piano on which Ralph Vaughan Williams' wrote some of his most famous pieces has been restored. (Photo: U.S. Army 10th Mountain Division soldiers walk across the tarmac as they prepare to enter a Chinook helicopter March 13, 2002 at the Bagram Air Base near Kabul, Afghanistan. Credit: Joe Raedle/Getty Images)