''Mama'' tops weekend box office
Jessica Chastain dominates the weekend box office. Chastain has the top two movies this weekend. Her supernatural horror film "Mama" opens at number one with more than $28 million.
"Zero Dark Thirty" falls to second, with $17.6 million. "Silver Linings Playbook" is third. Arnold Schwarzenegger's return to top-billing is off to a weak start. Schwarzenegger's new film "The Last Stand" barely cracks the weekend top 10. It brings a little over 6 million -- one of his worst openings ever.