U.N. Secretary-General António Guterres raised concerns Thursday that a concrete dome built last century to contain waste from atomic-bomb tests is leaking radioactive material into the Pacific.

RICHLAND, Wash. - When Tim Snider arrived on Enewetak Atoll in the middle of the Pacific Ocean to clean up the fallout from dozens of nuclear tests on the ring of coral islands, Army officers ...

Graffiti in May 2018 is written on Runit Dome, in Enewetak Atoll of the Marshall Islands, urging the United States to take responsibility for the radioactive waste encapsulated inside the concrete ...

As nuclear explosions go, the US "Cactus" bomb test in May 1958 was relatively small -- but it has left a lasting legacy for the Marshall Islands in a dome-shaped radioactive dump. The dome -- ...