Two fine films directed by the remarkably prolific Clint Eastwood opened over the past four months, Changeling and Gran Torino. Indefatigable as ever, Eastwood, who will be 79 in May, is already shooting his next movie on location in South Africa. The Human Factorstars Morgan Freeman as Nelson Mandela and Matt Damon as star rugby player François Pienaar. It's set during Mandela's first term as president of South Africa after spending 27 years in prison, when he campaigned for his country to host the 1995 rugby World Cup.