http://avmedia.popularmechanics.com/audio/PopMechShow41.mp3 Airport Headaches, Clean Diesel, M.C. Hammer and More http://feeds.feedburner.com/~r/ThePopularMechanicsShow/~3/189124570/PopMechShow41.mp3 2007-11-21 http://media.popularmechanics.com/images/PodcastIcon.jpg