The veterans of FORCE BLUE are no strangers to in-depth exploration. Over the past decade, these former Special Operations veterans have deployed alongside scientists on countless marine conservation missions throughout the United States and the Caribbean. Here, however, in the warm, Pacific waters off Okinawa, where this four-man team of two Navy SEALs, one Army Green Beret and one Recon Marine will rebuild a coral reef that, 80 years ago, their predecessors destroyed, they will be asked to go deeper than they have ever gone before. By land and by sea, they'll explore the nightmare experiences of the 183,000 U.S. servicemen, 100,000 Japanese and 300,000 Okinawan civilians, who, from April 1 to June 22 , 1945, suffered through what can only be described as "Hell on Earth." From the suicide cliffs at the southern tip of the island to the spidery network of caves and heavily fortified positions that comprised the vaunted Japanese Shuri Line, to the island's offshore waters where as many