Canceled flights are seen on a departures board at Hartsfield-Jackson International Airport, Thursday, Nov. 19, 2009 in Atlanta. Air travelers nationwide scrambled to revise their plans Thursday after an FAA computer glitch caused widespread cancellations and delays for the second time in 15 months. The Federal Aviation Administration said the problem, which lasted about five hours, was fixed around 10 a.m. , but it was unclear how long flights would be affected.