WASHINGTON -- In a sign of how urgently he wants to shake up the Air Force, Defense Secretary Robert M. Gates announced today he was appointing the first non-fighter pilot to become the service's chief of staff in more than 25 years. The nomination of Gen. Norton A. Schwartz, who is currently head of the Pentagon's transportation command and rose through the ranks as a pilot of military cargo planes, marks a significant break for the Air Force, which has been led by fighter and bomber pilots almost since its inception after World War II. In his announcement naming Schwartz,...