But the power outage knocked out the equipment that allows airlines to check in and to seat passengers on their planes. Southwest Airlines said it had to cancel all flights to the Hartsfield-Jackson International Airport for the balance of the day. At the time of the power outage, it ordered all flights into Atlanta to stay where they were. Eastern, flights started to resume, with the airport saying at 7 pm that power would be fully restored by midnight. Perhaps the most well-known power outage played out on international television in 2013 during the Superbowl.

Source: Forbes December 17, 2017 23:22 UTC