The author describes how he overcame a tough childhood to enter the Navy SEAL elite sniper corps. Discusses his training, combat tours in the Persian Gulf and Afghanistan, inner workings of the U.S. military, and his role as a lead instructor for the shadowy Sniper Cell and course manager of the Navy SEAL sniper program that trained both Marcus Luttrell of "Lone Survivor" and Chris Kyle of "American Sniper."

Includes index.

Modern warfare -- A word from the author -- Born ready for action -- Boot camp training -- Becoming a Navy SEAL -- One of America's deadliest snipers -- Duty calls -- Continuing to protect and defend.