Resilience HQ on Instagram: "A Mark 7 nuclear gravity bomb was detonated deep underwater, sending a massive column of water vapor soaring over half a mile high into the air. Code-named “Wahoo,” the test took place on May 16, 1958, near Enewetak Atoll in the Marshall Islands — part of a U.S. series studying how nuclear blasts behave beneath the ocean’s surface. The explosion created shockwaves powerful enough to sink ships in the test area and left behind a giant plume that stretched high above t