LOUISVILLE, Ky., March 22, 2012 — Kenworth Truck Co. is expanding its extensive line of industry-leading green products by offering the Cummins Westport ISX12 G heavy duty natural gas engine for use in regional haul, vocational and refuse markets. This new engine requires a single fuel source and can run on either compressed (CNG) or liquefied (LNG) natural gas. For the rest of the story, please visit “News Release” on the Kenworth.com website. Photos are available for download from the Kenworth photo site on Flickr.com