Patriot-News: The coffee mug handed out Wednesday to reporters from as far away as Germany read “Three Mile Island: Clean, Safe, Reliable.” That’s the message organizers wanted to give for media day at the Three Mile Island nuclear power plant. The event came two weeks shy of the 30th anniversary of America’s worst nuclear accident. On March 28, 1979, residents across the region fled after a valve malfunctioned at TMI’s Unit 2 reactor, triggering a partial meltdown of the reactor’s core and …