
Every flight across US grounded due to computer system glitch
The Federal Aviation Administration said it was working to restore its Notice to Air Missions system which alerts pilots of potential hazards along a flight route. Some 4,948 flights within, into or out of the US have been delayed, according to a flight tracking website, and 868 cancelled.

Some 4,013 flights within, into or out of the US have been delayed today, according to flight tracker FlightAware.com, while 710 have been cancelled. Most delays were concentrated along the East Coast.