Delta Air Lines is slowly recovering from a computer systems crash on Monday that grounded flights and stranded thousands of passengers across the globe.
The airline says the problems were caused by a power outage in Atlanta. Flights have resumed but the company is still playing catch-up.
The glitch comes less than a month after Southwest Airlines faced similar computer trouble that resulted in mass cancellations and delays. Last September, American Airlines also had to suspend flights from three of its hubs due to technical problems.
Experts say that as airlines automate more of their operations, such computer disruptions become a bigger and bigger risk.