 And we can't get out. Some of the airline's ground stops have now been lifted. But what happened? Security firm CrowdStrike blames a glitch in a Windows update that was put out overnight. Matthew Frazier is New York City's chief technology officer. It impacted a number of workstations. And what you're seeing across not just New York City, but across the global estate, anyone that's a customer of theirs, you're seeing an impact to anything that received the update during that period.