"We are sorry to our customers who experienced this disruption," Delta posted on its website Saturday, referring to Flight 248 Tuesday from Atlanta to Allentown. "We have followed up with the teams involved and all agree that this customer should not have been allowed to continue on the flight. Our responsibility for ensuring all customers feel safe and comfortable with Delta includes requiring civil behavior from everyone. The behavior we see in this video does not square with our training or culture and follow up will continue so we can better ensure our employees will know they will be fully supported to make the right decisions when these issues arise."