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Zero Signal Shorts: The CIA’s Heart Attack Gun
Season 1 · Episode 9

Zero Signal Shorts: The CIA’s Heart Attack Gun

Zero Signal · David & Jay Green

September 23, 202512m 44s

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Show Notes

In 1975, during a Senate hearing known as the Church Committee, CIA Director William Colby revealed something that looked like it belonged in a James Bond film — a dart gun designed to fire frozen poison and mimic a fatal heart attack. The weapon was part of MKNAOMI, a little-known Cold War program where the CIA, working with the U.S. Army, stockpiled lethal toxins and built covert weapons hidden from public view.

In this short-form episode of Zero Signal, we dive into the truth and the conspiracy: what MKNAOMI was, the toxins it stored, the infamous “heart attack gun,” and the lingering question — if the CIA kept poisons on ice after they were ordered destroyed, what else might be hidden today?

👉 For more deep-dive episodes on conspiracies, secrets, and history’s shadows, tune in every Tuesday at 6 a.m.

Credit:Portions of this episode include content provided courtesy of C-SPAN.Source: C-SPAN – CIA Director William Colby, The Church Committee, and the Shellfish Toxin Dart Gun

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