US air travel is not expected to return to normal schedules until late on Sunday, the head of the FAA said, as the aviation system gradually recovers from a nationwide flight shutdown that officials blamed on routine maintenance gone awry.As of 9:35 p.m. ET (0235 GMT), airlines on Saturday had canceled more than 6,400 US flights and delayed more than 8,000, according to FlightAware, an aviation website. That followed about 9,200 flights canceled and 7,500 delayed on Friday after the FAA ordere...
