Steven Spielberg is back on top of the box office . The legendary filmmaker's new sci-fi thriller Disclosure Day opened at No. 1 worldwide this weekend, pulling in $48.9 million from 73 international markets and another $44 million domestically for a global debut of $92.9 million, Variety reports. The film marks Spielberg's biggest opening weekend ever for an original movie, not adjusted for inflation, and gives the director his first major summer blockbuster launch in a decade. Starring Emily Blunt, Josh O'Connor, and Colman Domingo, Disclosure Day follows a meteorologist and a cybersecurity expert who team up to uncover a government conspiracy involving extraterrestrial life. The film revisits Spielberg's long-running fascination with alien stories, decades after classics like Close Encounters of the Third Kind and E.T. International audiences will play a major role in determining the film's long-term success.…