Travel September 5, 2023 4:31 pm ‘Systemwide technology issue' led to nationwide ground stop for United Airlines A nationwide ground stop was issued for United Airlines flights Tuesday, just as the long Labor Day weekend travel was coming to an end. Kate Chappell has a recap. Local 0:57 Second wave of runners take off for the Chicago Marathon 1:01 Watch: Elite runners step off in the Bank of America Chicago Marathon 1:05 Chicago Marathon holds a moment of silence for marathon world record holder Kelvin Kiptum 0:44 Bank of America Chicago Marathon wheelchair races take off from Grant Park 1:55 Chicago Marathon pays tribute to Kelvin Kiptum