U.S. senators reached an agreement on airline pension legislation that would extend assistance to two more carriers, American Airlines and Continental Airlines Inc., Senator Charles Grassley said. The bill gives Delta Airlines Inc. and Northwest Airlines Corp. 14 years to make pension payments otherwise due in a few years. The "leniency" would be extended to Continental and AMR Corp.'s American under the bill, Grassley, chairman of the Senate Finance Committee, said Wednesday. A vote by the full Senate may happen this week.