Truk Lagoon in the Western Pacific Ocean is one of the most attractive places on earth. Formed by a coral reef 140 miles long, its warm, shallow waters teem with marine life. Many visitors to Truk are divers attracted by a seemingly unspoilt world of natural beauty and peace. But there is another reason why divers are attracted to Truk Lagoon, a reason from the pages of history. In February 1944, this Micronesian paradise was visited by the full force of war, an air attack by the United States on the occupying Japanese forces. It was a massive aerial assault, and its consequences can still be seen today. Below the water surface of the lagoon are the preserved remains of ships, aircraft and other military material. It was warplanes launched from American carriers that created this underwater graveyard during the two days of Operation Hailstone.