Operation LAC: When the U.S. Secretly Sprayed Chemicals Over Cities

Did the U.S. government really spray chemicals over its own citizens? In this chilling episode of The Strange History Podcast, we uncover the truth behind Operation LAC (Large Area Coverage), a Cold War-era experiment where the U.S. Army released microscopic particles into the atmosphere over populated areas to study how biological weapons might spread.
Conducted in the late 1950s, Operation LAC used zinc cadmium sulfide to track dispersal patterns across cities and rural regions—all without public knowledge or consent. While officials claimed the substance was harmless, later research raised questions about potential health risks and long-term exposure.
Why did the government carry out these tests? What did they learn? And what does this reveal about the lengths taken during the Cold War in the name of national security?
If you’re fascinated by government experiments, Cold War secrets, conspiracy theories, and declassified history, this episode dives into one of the most unsettling real-life operations ever conducted on American soil


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