LOS ANGELES — The "Age of Ultron" is not over. The Avengers sequel topped the domestic box office for the second weekend in a row with an estimated $77.2 million according to Rentrak estimates Sunday. The film has earned a staggering $312.9 million in just 10 days in theaters, tying with "The Dark Knight" to become the second-fastest film to do so. While a wild success by any measure, the film is still lagging behind the record-setting precedent of 2012's "The Avengers," which made $103.1 million in its second weekend in theatres and had a domestic total of $373 million at the same point in the cycle. "Avengers: Age of Ultron" also added $68.3 million internationally, bringing its worldwide total to $875.3 million. The Disney and Marvel sequel opens in China on May 12 with midnight screenings. The midnight sellouts have even prompted Chinese IMAX screens to add 3 a.m. showings to their schedule. - AP