There is an island that is still radioactive. But its amazing scenery and dark history mean tourists still visit.

Below its emerald waters, these tropical islands in the heart of the Pacific conceal the world's biggest underwater graveyard.

In 1944, the US Navy commences Operation Hailstone, a 48 hours combined air and ground attack that devastates the Japanese position at Truk Lagoon, an atoll in Micronesia.