At this moment 75 years ago—11:02am August 9, local time, "Fat Man”—a 21-kiloton implosion-type atomic bomb—exploded ~1,650 feet over Nagasaki, missing its intended aim point by 1.3 miles but killing an estimated 70,000 men, women, and children and injuring some 60,000 more.
Almost every home within 1.5 miles of ground zero was destroyed. Of the 52,000 homes in Nagasaki that day, 14,000 (27%) were destroyed and another 5,400 were significantly damaged. Combustible materials like paper were instantly ignited by the thermal pulse up to 1.9 miles away.
Nagasaki was added to the target list—Hiroshima, Kokura, and Niigita—one day before it was finalized, replacing Kyoto. It was bombed only because ground haze and smoke obscured Kokura, the primary target. Nagasaki almost wasn’t destroyed because it was mostly obscured by clouds.
To learn more about the bombing of Nagasaki and its aftermath, see this excellent thread by
@wellerstein: https://twitter.com/wellerstein/status/1159799358650499072?s=20
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