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On 10 July 1958, a magnitude 7.9 earthquake triggered the largest wave in recorded history. Ninety million tons of rock crashed into Lituya Bay, Alaska, sending water surging 1,720 feet up the mountainside, stripping trees and soil in a single catastrophic event. Three fishing boats were caught in the bay that night. Two crews survived against impossible odds. One did not. The megatsunami redefined what scientists believed water could do and remains the defining case study in coastal hazard modelling. Also on this day: French intelligence agents sank the Greenpeace vessel Rainbow Warrior in Auckland Harbour in 1985, killing one photographer and sparking an international scandal. And in 2018, the final four members of a Thai youth football team emerged from the Tham Luang cave system after 18 days underground, completing one of the most remarkable rescue operations of the century. Clara Vale explores a day when history arrived as a wall of water, a covert bombing, and a moment of extraordinary human coordination.