Looking out over the flat expanse of Arco, Idaho, it’s understandable why it’s been used for nuclear reactor experimentation. Any slip ups would render uninhabitable a plain that is already devoid of trees or towns. It’s pretty empty here still, with the 900 square mile Idaho National Energy Laboratory closed to the public. A historical marker boasts, “Since 1949, more nuclear reactors, over 50 of them, h
