WASHINGTON (AP) - Companies that teach pilots to fly large aircraft would need permission from Attorney General John Ashcroft to instruct a noncitizen under rules proposed Tuesday by the Justice Department. Congress has mandated that noncitizens be screened by the attorney general in response to the Sept. 11 terrorist attacks. Public comment on the new rules will be accepted for 30 days before they are enforced. "Carefully screening individuals who come to the United States to learn to fly large aircraft is a safeguard needed to prevent future acts of terrorism," Ashcroft said in a statement. "The screening system, when...