THE NEW YORK TIMES, March 25, 1954 

* Castle Bravo nuclear hydrogen atomic bomb detonation 
* Bikini Atoll - Marshall Islands - 15-magaton explosion 

The front page has a two column heading: "Hydrogen Blast Astonished Scientists, Eisenhower Says" with subhead. (see images) 
Complete with all 60 pages, light toning at the margins, nice condition.

Background: Detonated on March 1, 1954, at Bikini Atoll, Castle Bravo remains the most powerful and infamous nuclear detonation in United States history, producing an unprecedented 15-megaton explosion—roughly 1,000 times the destructive yield of the Hiroshima bomb. The test holds singular historic and scientific notoriety due to a catastrophic miscalculation: physicists assumed the lithium-7 isotope in the dry fusion fuel was inert, but under extreme neutron bombardment, it reacted violently, tripling the expected 5-megaton yield. This unexpected thermal runaway created a 4.5-mile-wide fireball, vaporized entire islands, and gouged a 6,500-foot crater into the ocean floor. The resulting environmental fallout became the worst radiological disaster in American history, blanketing over 7,000 square miles of the Pacific, sickening the crew of the Japanese fishing vessel Lucky Dragon No. 5, and inflicting severe radiation sickness and permanent displacement on the indigenous populations of the Rongelap and Utirik atolls. Beyond its raw magnitude, Castle Bravo is notable as the decisive catalyst that transformed nuclear diplomacy, single-handedly fueling global anti-nuclear sentiment and accelerating the path toward the 1963 Limited Test Ban Treaty.