Cold War-era 'coffin' leaking nuclear waste into Pacific: UN chief

A 40-year-old "coffin" built to contain nuclear waste could be leaking radioactive material into Pacific, UN Secretary-General António Guterres has warned. The US dumped waste from 67 nuclear tests it conducted from 1946-1958 during the Cold War into the crater, capped with an 18-inch-thick concrete dome. Its bottom was never lined as it was intended to be a temporary measure.