As America’s Minuteman III intercontinental ballistic missile force ages, the U.S. Air Force is facing another problem: obsolete transport vehicles needed to carry missile warheads, rocket engines and other vital equipment. The Air Force wants to buy more armored transporters to replace the current Payload Transporter, or PT III. The Payload Transporter Replacement, or PTR, will replace “the existing legacy payload transporter fleet (PT III) due to parts obsolescence, fleet age, increasing