Oddly Horrifying on Instagram: "In 1958, the United States carried out an underwater nuclear test near Enewetak Atoll in the Marshall Islands. Known as “Wahoo,” the experiment involved detonating a Mark 7 nuclear bomb roughly 500 feet beneath the ocean’s surface. The explosion sent a towering column of vapor soaring more than half a mile into the sky — a striking display of the immense power of early atomic weapons."