They showed up in force and en masse, thousands of Portsmouth Naval Shipyard workers donning yellow shirts with a fighting spirit. Twenty years ago, in 2005, a U.S. Department of Defense-appointed commission voted to remove Portsmouth Naval Shipyard from the list of potential military bases to close, saving thousands of jobs for Seacoast residents and sparing the generational shipyard from death. On May 13, 2005, then-Defense Secretary Donald Rumsfeld released a list of recommended base closures