In tough financial times, the country's major airlines are saving money by hiring outside companies to repair their airplanes. Eagan-based Northwest Airlines now hires companies both in the U.S. and overseas to do a larger portion of its maintenance than ever before. A recent government report has raised new questions about this trend. Northwest union mechanics say it could mean lower-quality repairs, and put flights at greater risk of terrorist attack. Northwest says outsourcing is not only safe, but critical to the airline's survival. Minnesota Public Radio's Jeff Horwich reports.