He described the removal by airport police as "truly horrific".
But when asked by ABC whether the passenger was at fault in any way, Munoz replied, "No, he can't be". 'We can't do that'.
Munoz spoke three days after a passenger was dragged off a plane, bloodied and screaming, by authorities at Chicago O'Hare International Airport. A fellow passenger recorded a video that showed Dao being yanked from his seat and dragged off the plane with blood on his face. "No one should ever be treated this way", Munoz said. The airline first asked for volunteers to take another flight, but when no one volunteered, four people were chosen at random.
Dr. David Dao was forcibly removed from a full flight after refusing to relinquish his seat.
Demand to see Trump's tax returns will only grow
During the campaign trail, President Trump promised to release his tax returns but after 86 days in office, he has yet to do so. Images of tax protesters in cities including Washington , Philadelphia, Chicago , Los Angeles and NY flooded social media.
"To have somebody pay for a ticket, reserve a seat, be seated and then dragged off the plane physically by law enforcement officers at the direction of United (Airlines) - it's outrageous", Christie told CNN's "New Day" on Wednesday.
The Aviation Department's roughly 300 officers guard the city's two main airports but are not part of the regular Chicago police force, receive less training and can not carry guns inside the terminals.
Dao informed the officer that he's a physician and had to get back to Louisville to see patients Monday morning.
United's explanation "has been unsatisfactory, and appears to underestimate the public anger about this incident", four senators wrote in letters Tuesday to United CEO Oscar Munoz and Ginger Evans, commissioner of the Chicago Department of Aviation.
Cummings ended the post by saying, "The more the videos of the flight play, the more my heart breaks for Dr. Dao and our community as a whole".
The video also underscores a growing dilemma: From airlines to schools, police are called to deal with situations that in the past might have been handled without them, sometimes leading officers to respond with force far beyond the provocation.
'Mother of all bombs' has Afghans divided
But former President Hamid Karzai accused the United States of using Afghanistan as "a testing ground for new and risky weapons". The massive bomb terrified villagers 20 miles away across the border in Pakistan with a blast they described as earsplitting.
The statement noted that "it is legal for airlines to involuntarily bump passengers when there are not enough volunteers" and that "it is the airline's responsibility to determine its own fair boarding priorities".
Other passengers on Flight 3411 are heard saying, "Please, my God", "What are you doing?"
An officer tells Dao that they will be forced to drag him off the plane.
Cummings added that she became concerned for her and her toddler's safety after police were called aboard to remove Dao.
Dao's attorneys at the law firm Corboy & Demetrio said they would hold a news conference on Thursday to discuss the petition.
Here's how you can help name April the giraffe's calf
The Harpursville, New York , zoo has opened a baby-naming contest on their website after the calf's Saturday, April 15, birth . Animal Adventure Park is giving all of April's fans a chance to further their bond by helping to choose a name for her baby.