 Images of the scene showed the engine on its side in the middle of the dart track surrounded by firefighters. On the rain-soaked pavement above, a massive highway sign structure collapsed over four lanes of the highway. Airlines, including Delta, continued to struggle to restore operations two days after a faulty software update caused technological havoc worldwide and resulted in several carriers grounding flights. Total cancellations within, into, or out of the U.S. on Sunday clocked in at a little more than 1,400, according to FlightAware,