Former International Energy Agency executive director Nobuo Tanaka outlined Japan's journey back to nuclear power and its potential to become the world leader on new nuclear technology. huffingtonpost.com TEPCO announced today that the “Warrior” robot, designed and engineered in the United States, tipped over during an inspection of the Fukushima Unit 2 reactor building two weeks ago and could not be retrieved due a dead battery. fukushimaupdate.com North Korea said on Friday that the world would have to “wait and see” when asked for details of “a new form” of nuclear test it threatened to carry out after the United Nations Security Council condemned Pyongyang’s recent ballistic missile launch. nydailynews.com The Hanford Nuclear Reservation is America's most contaminated nuclear site, and the focus of an ongoing cleanup that is costing taxpayers some $2 billion per year. io9.com