New Top-Level Change at AOL Could Foretell Fresher Content "Mr. de Castro was notable for a charged-up, enthusiastic management style. He pumped rock music into the hallways of Creative Center 1, the building on America Online's campus in Dulles, Va., where the service is programmed, and he tought an early morning class on spinning, aerobics on stationary bicycles. He changed the AOL welcome screen, one of the most visited patches of cyberspace, to focus more on gossip and popular culture."