What does it take, both physically and mentally, to join the world"s most respected - and feared - military units? In compelling detail, Jon E.Lewis provides insights into the origins, training, tactics, weapons and achievements of special forces and special mission units throughout the world, including the Navy SEALs, the Green Berets, Delta Force and Russia"s Spetsnaz. As well as unlocking the secrets of their training in everything from wilderness survival to hand-to-hand combat, he reveals the codes that bind the members of these elite units together.