Julie Kent, former ballet dancer turned Artistic Director of The Washington Ballet, reviews iconic ballet scenes from films including 'Black Swan,' 'Mao's Last Dancer,' 'The Game Plan,' 'The Nutcracker and the Four Realms,' 'The Red Shoes,' 'The Turning Point,' 'Billy Elliot,' 'Center Stage,' 'Save the Last Dance,' 'The White Crow' and 'White Nights.'