How do you train someone to spy? How do you collaborate with other countries on spy education and not lose your own secrets? How are these things consistently accomplished in a dangerously changing world front? Darrell M. Blocker, a 28-year veteran of the CIA’s clandestine service, explores these and other compelling questions and discusses the challenge he faced as chief of all clandestine service operations in sub-Saharan Africa. A recipient of the Distinguished Career Intelligence Medal, Blocker served as deputy director of the CIA’s Counterterrorism Center and chief of the Africa Division.