In 1970, Christopher Pyle disclosed in public writing that the U.S. Army was running a domestic intelligence program aimed at anti-war and civil-rights activists. His disclosure began a series of public-accountability leaks, the most famous of which was Daniel Ellsberg's leak of the Pentagon Papers. These disclosures, the FBI's notorious abuses in COINTELPRO, and the Watergate leaks taught Americans that the national-security system can take profoundly dangerous constitutional turns. They formed the foundation of the political will that led to the passage of the Foreign Intelligence Surveillance Act in 1978. And although Ellsberg and his collaborator Anthony Russo were prosecuted, their cases were dismissed.