All flights across US grounded due to air traffic control communications problems

US Transportation Secretary Sean Duffy said FAA technicians were investigating the issue. Homeland Security chief Markwayne Mullin later added there was no indication of a threat to the country.
This is a brief. The reporting belongs to Le Monde (English) — read the complete story, with full context and credits, at the source.
Read the full story at Le Monde (English) ↗lemonde.fr
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