Critic's Notebook: From Ferguson to the Sony hack, 'Selma' seizes its moment

Most movies choose their moments. Then there are those rare moments that seem to choose their movies.The film "Selma," about Martin Luther King Jr. and the historic marches he led from Selma, Ala., to Montgomery in 1965, has been eight years in the making, having been started, stopped and stalled started again for any number of reasons. Finally, in 2013, at the instigation of the film's star, David Oyelowo, Ava DuVernay was hired to direct a film that, once it hit the big screen, would be the fi...