“Nuclear power, no thanks!” What was once a slogan found on the bumper of many a German car became a reality Saturday, as the country shut down its three remaining nuclear power plants in line with a long-planned transition toward renewable energy. The shutdown of Emsland, Neckarwestheim II and Isar II shortly before midnight was cheered earlier in the day by anti-nuclear campaigners outside the three reactors and at rallies in Berlin and Munich. Inside the plants, staff held more somber ceremonies to mark the occasion. People take part in a protest against the shut down of the last three…