Seth Doane heads to Barcelona for a visit to La Sagrada Família, the largest unfinished Catholic Church in the world, designed by the late pioneering architect Antoni Gaudí, which has been under construction since 1882. Ben Mankiewicz talks with legendary director Steven Spielberg about his new film “Disclosure Day,” his career, and Spielberg's belief that there are aliens among us. Mo Rocca goes behind the scenes of the Tony-nominated Broadway musical “Ragtime,” based on the bestselling novel by E.L. Doctorow.