Half buried in the sand, the vast structure looks like a downed UFO. At the summit, figures carved into the weathered concrete state only the year of construction: 1979. Officially, this vast structure is known as the Runit Dome. Locals call it The Tomb. Below the 18-inch concrete cap rests the United States' cold war legacy to this remote corner of the Pacific Ocean: 111,000 cubic yards of radioactive debris left behind after 12 years of nuclear tests. Sections of concrete have started to crack away. Underground, radioactive waste has already started to leach out of the crater: according to a 2013 report by the US Department of Energy, soil around the dome is already more contaminated than its contents. The US has never formally apologized to the Marshall Islands for turning it into an atomic testing ground. When the UN special rapporteur on human rights and toxic waste, Calin Georgescu, visited the Marshall Islands in 2012 he criticized the US, remarking that the islanders feel like 'nomads' in their own country. Nuclear testing, he said, left a legacy of distrust in the hearts and minds of the Marshallese". "Why Enewetak?" asked Ading, Enewetak's exiled senator during an interview in the nation's capital. "Every day, I have that same question. Why not go to some other atoll in the world? Or why not do it in Nevada, their backyard? I know why. Because they don't want the burden of having nuclear waste in their backyard. They want the nuclear waste ... thousands miles away. That's why they picked the Marshall Islands."