LOS ANGELES — The CIA thrillers “Argo” and “Zero Dark Thirty” have won top screenplay honors from the Writers Guild of America. The guild's adapted screenplay award Sunday went to Chris Terrio for “Argo,” director Ben Affleck's tale of the CIA's daring masquerade of six US diplomats as a Hollywood film crew to rescue them from Iran during the hostage crisis there. Mark Boal won the prize for original screenplay for “Zero Dark Thirty,” director Kathryn Bigelow's chronicle of the CIA's manhunt for Al-Qaeda leader. The guild was the last of Hollywood's major trade unions to weigh in on the year's top films before next Sunday's Academy Awards. “Argo” has emerged as the best-picture favorite for the Oscars after sweeping top prizes at earlier film honors, including the Golden Globes and awards from the Directors Guild of America, the Screen Actors Guild and the Producers Guild of America. — AP
