United Airlines temporarily halted all takeoffs in the United States early Tuesday because of automation issues. Planes in the air were not affected.

The stoppage involving the world's second-largest airline lasted for less than an hour, according to air traffic control notices from the Federal Aviation Administration.

Chicago-based United said by e-mail, "We began delaying flights at approx. 8 a.m. CT to ensure aircraft departed with proper dispatch information. Flights are now departing." United didn't immediately respond to requests for further comment beyond the e-mailed statement.

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