someone implied that without radar, positive control was impossible.
well, I remind all of you that non radar methods of seperation do exist and are practiced regularly on much of oceanic airspace.
I haven't seen the NBC video, but the only video that would mean anything would be radar tracks...which may or may not be available.
the wingspan of the piper was less than thirty four feet, tip to tip...think if even one second difference in takeoff of either craft had happened...a miss is as good as a mile.