Eventus on Instagram: "In 1958, the United States conducted a series of nuclear experiments known as Operation Hardtack. One of the most dramatic tests involved detonating a nuclear bomb deep beneath the surface of the Pacific Ocean — at a depth of about 150 meters. The purpose was to study how a nuclear explosion behaves underwater and what destructive power it could unleash against submarines, naval fleets, and coastal infrastructure. When the bomb detonated, the water above it was violently b