Newly developed robot for underwater investigation for a Fukushima’s damaged reactor moves through the water at a test facility in Yokosuka near Tokyo Thursday, June 15, 2017. The robot, co-developed by the debt-strapped Japanese nuclear and electronics company Toshiba Corp., and the International Research Institute for Nuclear Decommissioning, is ready for deployment this summer at the badly-damaged Unit 3 primary containment vessel to assess its damage and locate parts of melted fuel, believed to be submerged under highly contaminated water. The robot, about the size of a loaf of bread, has tail propellers and collects data using two cameras, a dosimeter and lighting that are mounted on it. (AP Photo/Shuji Kajiyama)