WATCH: David Muir shares how son helped dad on retirement flight after ALS cut career short

David Muir shares the remarkable story of how a son helped his pilot dad fulfill a lifelong dream of taking his retirement flight after his aviation career was cut short by an ALS diagnosis.

​David Muir shares the remarkable story of how a son helped his pilot dad fulfill a lifelong dream of taking his retirement flight after his aviation career was cut short by an ALS diagnosis.  WNT David Muir shares the remarkable story of how a son helped his pilot dad fulfill a lifelong dream of taking his retirement flight after his aviation career was cut short by an ALS diagnosis.