Mack Showcases Natural Gas-Powered MACK® Pinnacle™ Built for UPS at MATS Truck Displayed in Mack Booth #30245 LOUISVILLE, KY (March 21, 2013) – Mack Trucks today unveiled its highly anticipated 12-liter natural gas-powered MACK® Pinnacle™ Axle Back model during the 2013 Mid-America Trucking Show. The natural gas-powered Mack Pinnacle, offering a liquefied natural gas (LNG) solution for on-highway applications, was built for UPS (NYSE: UPS). The addition of the natural gas-powered Pinnacle expands Mack’s natural gas line-up to the highway segment. Mack already offers natural gas-powered MACK®