CHARLY TRIBALLEAU/AFP via Getty Images
- Air travel in the US is snarled after a global IT outage.
- A map shows air traffic grinding nearly to a halt during a normally busy early morning period.
- Major US airlines were resuming flights Friday after grounding planes because of the IT issue.
Friday's IT outage caused widespread disruptions after Microsoft reported problems with its online services, linked to an issue at cybersecurity firm CrowdStrike.
But it had one of its most dramatic effects on US commercial flights.