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.

Prompted by a radar failure a week ago at Newark Liberty Airport, and a midair collision that killed 67 people in Washington D.C., President Donald Trump‘s administration announced an unprecedented program to rebuild the nation’s air traffic control system and recruit more air traffic controllers.

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,