The nation's top aviation regulator is suggesting that local police around the country should file charges more often against unruly airline passengers and that airports should clamp down on alcohol sales. Federal Aviation Administration chief Stephen Dickson said that every week police are asked to be there when a flight lands after an incident involving passengers, including cases in which they assault flight attendants. “Nevertheless, many of these passengers were interviewed by local police and released without criminal charges of any kind,” Dickson said in letters to airport officials.