A Dallas policeman will have more surgery today, his third operation since he was injured in Saturday night's high-speed pursuit that began in Lake Highlands and ended in Pleasant Grove.  Officer Christopher Cordray has serious injuries to his feet, legs and hips because his squad car crashed directly into a tree.  Another officer's car ended up in a ditch but he was not seriously hurt.  The man they were chasing finally bailed out and ran for it but he was chased down quickly and taken to jail on charges of evading arrest and assault on a police officer.