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How ‘War and Peace’ on a cruise ship led to Broadway’s ‘The Great Comet’

"Natasha, Pierre and the Great Comet of 1812" has been hailed as one of the most innovative musicals of the decade. It all began on a cruise ship with a copy of 'War and Peace.' Yahoo Global News Anchor Katie Couric spoke with "The Great Comet" creator and composer Dave Malloy about the musical's origins.