Pascal to step down as Sony studio head after hacking upheaval

By Mary Milliken and Lisa Richwine LOS ANGELES (Reuters) - Amy Pascal will step down as co-chairman of Sony Pictures Entertainment after hackers angry about a movie she championed mocking North Korea's dictator exposed a raft of embarrassing emails between Pascal and other Hollywood figures. One of the most powerful women executives in Hollywood, Pascal had kept a low profile since her emails were leaked by hackers and widely reported by media, particularly one in which she made racially in