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.

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

Chuuk Lagoon is home to the largest naval cemetery with sunken Japanese ships, aircraft, gas masks, bullets, and skulls from World War II. Formerly known as Truk Atoll, the lagoon is part of Chuuk ...