Terrifying History on Instagram: "On May 16, 1958, the United States military conducted the Wahoo test, an underwater nuclear detonation that took place near Enewetak Atoll in the Marshall Islands. This 9-kiloton Mark 7 nuclear device was detonated at a depth of 500 feet in waters 3,200 feet deep as part of Operation Hardtack I.⁠ ⁠ Within just one second of detonation, the blast created a massive spray dome that reached 840 feet high after seven seconds, with its conical shape featuring 45-degre