“The Federal Aviation Administration, which has an operational monopoly on America’s technologically antiquated flight-control system, does not have enough air traffic controllers to meet consumer air travel demand, particularly in the New York City area. It’s the old, you-had-one-job meme, only this time ruining thousands of holiday plans, business trips, and family reunions.”
https://reason.com/2023/06/30/government-ruins-yet-another-holiday-travel-weekend/