By DAVID KOENIG and TOM KRISHER
AP Business Writers
U.S. air travel has returned mostly to normal, a day after a computer system that sends safety information to pilots broke down and grounded traffic from coast to coast. By early afternoon Thursday on the East Coast, only about 100 flights had been canceled and 1,700 delayed. Those figures are much lower than on Wednesday, when more than 1,300 flights were scrubbed and 11,000 delayed. The Federal Aviation Administration said a damaged database file appeared to have caused the outage in the safety-alert system. Transportation Secretary Pete Buttigieg promised a thorough examination to avoid another major failure.