WATCH: Man forcibly removed from overbooked United flight

CHICAGO, Illinois (NBC News) — Cell phone video shows a passenger being forcibly removed from a United Airlines flight yesterday, dragged down the aisle. The reason for the removal? The flight was overbooked.
United flight number 3411 headed from Chicago to Louisville was overbooked so the airline asked for four volunteers to leave the aircraft.
The airport said it had personnel who needed seats to be at work the next day.
A passenger on the flight who witnessed the incident has told repor