Project Plowshare. Between 1961 and 1973, under this program the United States conducted thirty-five individual nuclear detonations as part of twenty-seven tests. Each explosion had multiple research objectives, from examining products of the reaction to just straight up seeing how big a boom we could make.
“Between 1961 and 1973, under [Project Plowshare] the United States conducted thirty-five individual nuclear detonations as part of twenty-seven tests. Each explosion had multiple research objectives, from examining products of the reaction to just straight up seeing how big a boom we could make.”
Reference
Weinersmith, Kelly, & Zach Weinersmith (2017, oct. 7). “Soonish: Ten Emerging Technologies That'll Improve and/or Ruin Everything.” Kindle Edition. Chapter 4 Fusion Power, p. 97 of 358, 22%.

