As part of its $12 billion overhaul of the U.S. air traffic control system, the Department of Transportation is incorporating artificial intelligence into operations. This has led to concern that AI will replace controllers. 

"AI is a tool, but we do not replace humans in how we manage the airspace. Am I gonna replace a controller and have AI manage the airspace? The answer to that is hell no, that's not gonna happen," Transportation Secretary Sean Duffy told CBS News. 

Duffy said AI will help merge airline flight schedules with an FAA system, allowing controllers to move around flights and avoid delays. 

Duffy said the software can look at flight schedules 45 days out and move flights around — some later and some earlier — and this will reduce flight delays at airports.