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Jennifer Lawrence chats about her archery skills, growing up in Kentucky and her role in "The Hunger Games: Mockingjay - Part 1."
Terence Tao, a UCLA professor and winner of the 2015 Breakthrough Prize in Mathematics, discusses his lifelong fascination with mathematics and the mysteries of prime numbers.
Vermont Senator Bernie Sanders discusses the shortcomings of America's health care system and gives his take on why the Democrats lost in the 2014 midterm elections.