Most commercial air traffic was diverted, grounded, or rescheduled Wednesday morning after a computer malfunction caused unforeseeable widespread delays. President Joseph Biden said the source was still unknown. However, authorities ruled out the possibility of a cyberattack. There were no signs of that, Presidential Spokeswoman Karine Jean-Pierre said on Twitter.
Argentine air traffic controllers have warned they might go on strike in the coming days, which would cause a major setback to operations nationwide as the vacation season nears its end and classes are about to restart.
Canada has banned all flights arriving from Pakistan and also from India, where the spread of the coronavirus pandemic seems to have to ceil.
The organization responsible for coordinating European air traffic says it has fixed an earlier fault which led to widespread flight delays on Tuesday. Eurocontrol earlier said that delays could affect up to half of all flights in Europe - about 15,000 trips.