
The conversion of 450 LGM-30 Minuteman III ICBM silos to accomodate the Northrop Grumman [NOC] LGM-35A Sentinel is to draw lessons from recent work done by the Northrop Grumman team in Utah. Parsons Corp. [PSN], an original designer of the Minuteman silos, is a subcontractor to Northrop Grumman on the conversion of the Minuteman III silos for the Sentinel program. "Out in Promontory, Utah, about a year and a half, almost two years ago, there was a Minuteman III launch…