Paris (AFP) - Roman Polanski won best director for "An Officer and a Spy" at a fractious ceremony for the French Oscars, the Cesars, that ended in walkouts and recrimination in Paris early Saturday.The entire French academy had been forced to resign earlier this month amid fury that the veteran -- wanted in the US for the statutory rape of a 13-year-old girl in 1977 -- had topped the list of nominations.Protesters chanting "Lock up Polanski!" tried to storm the theatre where the ceremony was being held before being pushed back by police firing tear gas.And France's Culture Minister Franck Ries...