Newly uncovered research reveals the United States and New Zealand tested a "tsunami bomb" during World War II, the Telegraph reports.
The bomb reportedly uses underwater blasts to trigger massive tidal waves designed to destroy coastal cities.
New Zealand author and filmmaker Ray Waru uncovered the top secret operation, dubbed "Project Seal," while researching military files buried in the national archives, according to the Telegraph.
"Presumably if the atomic bomb had not worked as well as it did, we might have been tsunami-ing people," said Waru.
Tests revealed that a series of 10 large offshore blasts could potentially create a 33-foot tsunami wave capable of flooding a small city, the Telegraph reports.
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