A former CIA technical operations officer who helped rescue six U.S. diplomats from Iran in 1980 and was portrayed by Ben Affleck in the film "Argo," has died. "Tony Mendez was a true American hero. He was a man of extraordinary grace, decency, humility and kindness," Affleck tweeted Saturday. "He never sought the spotlight for his actions, he merely sought to serve his country. I'm so proud to have worked for him and to have told one of his stories."