Japan plans to rebuild over a dozen nuclear reactors by 2050; China is building seven new ones this year alone; in the U.S., two companies are building a hybrid nuclear-and-gas power plant; Germany admitted killing nuclear was a big mistake. Nuclear is back—and it makes the backbone of a new approach to energy security. “We clearly need more nuclear power and we’re bullish on it,” the president of Microsoft, Brad Smith said recently, as quoted by the Wall Street Journal, which reported that nuclear is back in favor with…