This small area of the south east sees by far the largest concentration of air traffic, and the 18 minute window required by iFACTS is a luxury here, explained Nats General Manager Paul Haskins.

BBC: Why air traffic control still needs the human touch

"We're opening up an unprecedented window into what goes on in the therapy room, " said Dr. Paul S. Appelbaum, director of the Division of Law, Ethics, and Psychiatry at the Columbia University College of Physicians and Surgeons.

CNN: STORY HIGHLIGHTS