ABC Evening News for Saturday, Apr 20, 1991
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(Studio: Carole Simpson) Report introduced.
(Washington: Jim Slade) Report that a new air traffic control computer system called T-CAS, for Traffic Alert and Collision Avoidance System, may actually put planes in danger examined; incidents of ghost planes "seen" on this system and of how the system works detailed. [Controller Duane DUPON, Transportation Secretary Samuel SKINNER, National Air Traffic Controllers Association Jim POOLE - talk about this equipment.]
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