White House: United Airlines incident 'troubling'

White House press secretary Sean Spicer says footage of a screaming passenger being dragged off a full United Airlines flight is "troubling".

"I don't think anyone looks at that video and isn't disturbed that another human being is treated that way," he told reporters at the daily briefing.

"Clearly watching another human being dragged down an aisle, watching, you know, blood come from their face after hitting an armrest... this probably could have been handled a little bit better."