Videos showing a man being violently removed from a United Airlines flight have provoked an outcry on social media.
The footage taken inside the airliner shows a man being violently pulled out of his seat and dragged down the aisle as passengers prepared to take off from Chicago to Louisville on Sunday evening.
One 50-second clip of the incident on Twitter was re-tweeted 16,000 times since it was posted that day.
“No one volunteered, so United decided to choose for us. They chose an Asian doctor and his wife.”
“The doctor needed to work at the hospital the next day, so he refused to volunteer,” Mr Anspach added.
“Ten minutes later, the doctor runs back into the plane with a bloody face, clings to a post in the back, chanting, “I need to go home.”
She wrote: “Please share this video. We are on this flight. United airlines overbooked the flight.”
“This man is a doctor and has to be at the hospital in the morning,” she added.
“He did not want to get off. We are all shaky and so disgusted.”
Thousands of Facebook comments have been posted about what happened.
One person wrote: “This is infuriating”
Another posted: “OMG So sad to see someone being treated like this. I wont fly United ever again.”
“There has to be more to this story,” he said.
“Usually when a flight is overbooked they offer free flight vouchers to those willing to change flights or go on standby and a couple of people will jump at those as their travel plans may be flexible.”
“I feel like this specific incident HAS to be deeper than what we are seeing in this video,” he added.
In a statement United airlines told the BBC: “Flight 3411 from Chicago to Louisville was overbooked.”
“After our team looked for volunteers, one customer refused to leave the aircraft voluntarily and law enforcement was asked to come to the gate,” the airline added.
The chief executive of United, Oscar Munoz, has since made a statement on Twitter: “This is an upsetting event to all of us here at United. I apologise for having to re-accommodate these customers.”
“We are also reaching out to this passenger to talk directly to him and further address and resolve the situation,” he added.
By Rozina Sini, BBC’s UGC and Social News team