The US is revisiting its compact of free association with Palau and Marshall Islands. The US will invest $1.6 million to investigate water quality on Enewetak Atoll for radioactivity.
Nuclear testing by the US totaling more than 30 megatons of TNT took place during the cold war; in 1977–1980, a concrete dome (the Runit Dome) was built on Runit Island to deposit radioactive soil and debris. The Runit Dome is deteriorating and could be breached by a typhoon, though the sediments in the lagoon are even more radioactive than those which are contained. -- Wikipedia.
Enewetak nuclear explosion. pn524