Passenger Jets Were 200 Vertical Feet Apart. the FAA is investigating a Nov. 23rd incident where two passenger jets nearly collided in the airspace over Colorado. the two planes merged on Air Traffic Control radar at the same altitude and in the same moment. "They were within a blink of an eye of colliding," and "It was the ugliest thing I've ever seen in all my years." The incident is classified as an "operational error" ...a mistake made by an air traffic controller. Several planes were en route to Denver on an arrival path from the northeast, called "Sayge Six."...