They are the Army's most elite top-secret strike force. But you won't hear about their heroics on the news, no headlines about them can appear in the papers, and no one--not even their families--can know who they are. First Special Forces Operational Detachment-D--Delta Force, America's supersecret counterterrorist unit. On paper they do not exist, but without them, our lives wouldn't be the same.

In this exclusive behind-the-scenes account, founding member Eric L. Haney, Command Sergeant Major, USA (ret.), takes you into the grueling selection and training process of Delta Force. From...