Book excerpt: For individuals aspiring to earn a place in a U.S. Special Ops force, the intensity and rigor of boot camp are only the beginning. Training for these elite forces can sometimes be as secret to the public as their missions are and demands a level of physical and mental endurance beyond what most people believe is possible. Readers will learn what members of various Special Ops Forces have had to survive, including such unforgiving scenarios as torture and ambushes—all without losing focus on the mission at hand—before they could count themselves among the country’s most highly trained soldiers.