Ever since he was a kid, Nicholas Kristof dreamed of being a foreign correspondent. And that’s what he spent decades doing, traveling to more than 150 countries to   cover conflicts and crises. Kristof is a two-time Pulitzer Prize winner for his reports on the deadly Tiananmen Square protests and for columns focusing attention on genocide in Darfur. He’s exposed human rights abuses, social injustices, global health catastrophes and gender issues in the developing world. Kristof has also been called the moral conscience of a generation. Chasing Hope is his new memoir. We talk about close calls, terrifying moments and how to be an optimist in a world torn apart by conflict.