How telecoms upgrade work sparked US flight chaos

US officials say the disruption was caused by old equipment overloading and not a cyber-attack.

First reported 15 Nov, 18:27Updated 15 Nov, 18:27

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BBC News15 Nov, 18:27
How telecoms upgrade work sparked US flight chaos
US officials say the disruption was caused by old equipment overloading and not a cyber-attack.

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