Christina Hillsberg joined the CIA as an eager 21-year-old in 2006. She spent more than a decade there: traveling undercover to CIA stations across the globe, meeting with clandestine sources ...

An agent’s life is not exactly like a James Bond movie: direct confrontation is avoided, victories are celebrated quietly and without fanfare, and the job can at times be as boring as any other.

For decades, the CIA’s training of Tibetan soldiers to fight Chinese invaders was a state secret, but even after the U.S. government formally acknowledged the CIA-Tibet effort, the exact location of ...