United CEO to Lester Holt: Dragging incident was 'system failure across the board'

United Airlines is out with its internal report on the incident earlier this month in which Dr. David Dao was dragged off a plane. In an exclusive interview, United CEO Oscar Munoz says the incident and subsequent backlash were the result of a system failure, from employees constrained by outdated rules to the bad choice of summoning law enforcement.April 27, 2017