How a U.S. intelligence analyst ended up spying for Cuba for 17 years—all while surrounded by family members who also worked for the FBI:

“Montes must have seemed a godsend. She was a leftist with a soft spot for bullied nations. She was bilingual and had dazzled her DOJ supervisors with her ambition and smarts. But most important, she had top-secret security clearance and was on the inside. ‘I hadn’t thought about actually doing anything until I was propositioned,’ Montes would later admit to investigators. The Cubans, she revealed, ‘tried to appeal to my conviction that what I was doing was right.’”