https://consumerist.com/2017/09/27/southwest-airlines-apologizes-after-video-shows-woman-being-forcibly-removed-from-plane/

Southwest Airlines apologized today after a video made the rounds this week showing a passenger being forcefully removed from a plane. 

The Baltimore Sun reports that the incident occurred Tuesday evening when a woman — flying from Baltimore to Los Angeles — complained about two animals on the plane and informed Southwest crew members that she had a life-threatening pet allergy.