Despite the widespread attention paid to the Navy SEALs (Sea, Air and Land) since they killed Osama bin Laden, the story of how these clandestine warriors evolved in response to changing threats ? from WWII to the War on Terror ? and how their extraordinary abilities shaped U.S. and world history, has remained untold. Few people know the unheralded tales of the first frogmen who dared to face almost certain death with little training, scant equipment and untested tactics.