Blast test halted by Indians.
The non-nuclear test blast would have sent a mushroom cloud of ammonium nitrate and fuel oil 10,000ft into the sky, visible and audible hundreds of miles away.
But the plans were scuppered when the leaders of Western Shoshone Nation protested. They proved they owned the test site in Ruby Valley, according to an 1863 treaty.
Western Shoshone Indian leader Carrie Dann filed a lawsuit, saying: "We all need to stand up and say, 'Hell no, we don't want this stuff around here. We don't need it. We have enough weapons'."
US defence bosses said the bomb was designed to blast underground targets.