A look at how the SEALs were instrumental in the battle of the War on Terror, where they undertook missions in Afghanistan and Iraq, and executed high-profile rescues of Captain Phillips from pirates and Jessica Buchanan in Somalia, plus the raid on Osama bin Laden's compound in Pakistan.

Part 1 takes us through the incredible history of the SEAL's predecessors in WWII and Korea--the underwater demolition teams that helped secure the beaches of Normandy and the Pacific--through their evolution into elite warriors, fighting in the jungles of Vietnam, the formation of SEAL Team 6, executing secret missions in Panama and Grenada, all the way up to 9-11-- the event that will change the way America fights wars.