Steven Spielberg, who has been dazzling us with his otherworldly visions since the '70s, returns to his sci-fi roots with "Disclosure Day," in which Emily Blunt's perky meteorologist and Josh O'Connor's tech genius fight to reveal the truth about the existence of aliens.The sci-fi thriller reteams him with "Jurassic Park" screenwriter David Koepp, who also scripted "The Lost World: Jurassic Park," "War of the Worlds" and the two most recent Indiana Jones movies.How does it stack up with his earlier films? There's a good deal of overlap between it and "E.T" and "Close Encounters of the Third Kind," which may...