MLB pitcher's tweet ignites debate on parental responsibility during flights.

A tweet by a professional baseball player about a flight attendant asking his wife to clean up popcorn spilled by their children has sparked a debate on social media about etiquette while flying with kids. Many commenters believe parents should be responsible for monitoring and cleaning up after their children, while others noted that flight attendants are focused on safety and not cleaning up after passengers. A travel expert advises giving each other grace and understanding when flying with children. United Airlines is handling the matter internally.