Iron Man leads the weekend box office with more than a hundred million in theater sales at the United States only. The Marvel Comics adaptation, starring Robert Downey Jr. as the guy in the metal suit, hauled in $100.7 million during its opening weekend and $104.2 million since debuting Thursday night, the second-best premiere ever for a nonsequel, according to studio estimates Sunday. It garnered more than 96.7 million dollars from overseas making it gross more than 200 million worldwide.