When the agency approved moving Newark air traffic controllers to Philadelphia, it said the odds of a dangerous communications breakdown was about 1 in 11 million.

An experienced air traffic controller retired just days after his radar failed as planes flew into New York airspace, according to The New York Times. The fault meant the Philadelphia-based Newark Liberty International Airport controller lost radar imagery for around a minute and a half on Aug.

Much has been made over the recent air traffic control system failures at Newark Airport, but in reality, the problem goes back a long time. According to a new report from CNN, air traffic controllers "repeatedly" warned of major safety issues and technology outages as early as last summer,