New CIA head Gina Haspel comes from a small, but proud cadre of high-ranking female intelligence officers. Declassified documents reveal the agency's long struggle with women as agents.
Whether it's a Nazi war criminal or an al-Qaeda terrorist, everyone leaves some kind of footprint.
At the CIA, tools of the espionage trade have ranged from to clothing cameras to dragonfly drones.
It's never been easy for CIA spies to operate under a fake identity. It's even harder in the era of Google, Facebook and LinkedIn.