The Shadow Home Secretary has criticised Theresa May over the issue of Border security, following delays and long queues at Heathrow Airport. Yvette Cooper said that the delays are "bad for travellers and security".
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Guillier conceded a "severe defeat" defeat to his supporters as the result came in.
The outage struck Hartfield-Jackson Atlanta International Airport at around 1pm local time, stopping all outgoing flights.
It will be a chilly day for many parts with the highest temperatures, about 10 Celsius (50F) in the far northwest.