United Airlines sees massive delays after hundreds of U.S. flights grounded due to technical issue - MarketWatch
1. Technical issue grounded hundreds of United Airlines flights during summer travel. 2. United Airlines resolved the issue but warns of residual delays. 3. Over 1,000 United flights delayed, affecting 34% of schedules. 4. Heightened air safety concerns follow previous airline incidents. 5. United shares are down 8.5% this year amid disruptions.