American Airlines requested a nationwide ground stop, which was later canceled, on the morning of Christmas Eve due to technical problems.

American Airlines said a “technical issue” is delaying all of its flights in the United States during one of the busiest travel periods of the year. “A technical issue is affecting American flights this morning,

The airline grounded all flights for a hour on one of the busiest travel days of the year - it says a "vendor technology issue" was to blame.