[article] A United flight attendant was injured when a plane was forced to brake suddenly to avoid a collision at Dulles International Airport Saturday morning. A Metropolitan Washington Airports Authority spokesperson said United Flight 379 to Orlando, FL, had pushed back from the terminal and started to taxi to the runway when the pilot made an abrupt stop to avoid a ground vehicle. A flight attendant who was standing was hurt during the stop. The spokesperson said the flight attendant was likely giving safety instructions when the stop occurred. The spokesperson said there was no collision with the ground vehicle and the flight returned to the gate. The flight attendant was transported to the hospital with non-life-threatening injuries. The driver of the ground vehicle was issued a notice of violation. He will be taken off airfield and go through retraining before being allowed to drive again. The flight to Orlando was originally scheduled to depart at 8:14 a.m. FlightAware, a live flight tracking website, reports the plane was rescheduled for departure at 9:16 a.m.