Copper wire upgrade caused nationwide flight suspension, US transport secretary says
BBC
The US government is trying to find out whether the chaos was caused by "incompetence" or faulty equipment.
تحميل تطبيق نبأ للآندرويد مجانا
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The US government is trying to find out whether the chaos was caused by "incompetence" or faulty equipment.
تحميل تطبيق نبأ للآندرويد مجانا