Efficient Descent Advisor, Simulaiton Number 2, ATC Lab N-257; with left to right Andrew Robertson, Lawrence Henderson, Ron Thompson

Efficient Descent Advisor, Simulaiton Number 2, ATC Lab N-257; ATC lab with Denver Air Traffic Controler Glen Hilgedick

Efficient Descent Advisor, Simulaiton Number 2, ATC Lab N-257; ATC lab with Denver Air Traffic Controlers Glen Hilgedick and Roger Bruce (on left)