LIMA — It is not as easy as it once was to find a parking space at Lima’s Joint Systems Manufacturing Center, and that is something U.S. Sen. Rob Portman, R-Ohio, likes to see. Portman toured the tank production facility Tuesday, part of a five-day tour of Ohio military installations. Along with getting a look at some of the increased activity and new projects the facility is undertaking, including both producing an upgraded Abrams tank and modernizing Stryker personnel carriers, Portman also held a town hall discussion with employees to hear their thoughts and concerns. “About six or seven years ago, the administration said it wanted to shut down this plant because people, frankly, didn’t see the need for tank production at that time,” he said.