US nuclear tests killed far more civilians than we knew

1953 FILE PHOTO - "Shot Grable", the first and only test of the Atomic Cannon using a live 280mm nuclear artillery shell which took place at the Nevada Test Site in 1953, as photographed by a member of the United States Air Force's Lookout Mountain 1352d Photographic Squadron.

From Quartz:

US nuclear tests killed far more civilians than we knew

When the US used nuclear weapons during World War II, bombing the Japanese cities of Hiroshima and Nagasaki, conservative estimates suggest 250,000 people died in immediate aftermath. Even those horrified by the bombing didn’t realize that the US would deploy similar weapons against its own people, accidentally, and on a comparable scale.

Slave Rebellions

Was wondering about slave rebellions is the US.  I knew about Nat Turner’s Rebellion, but I found this in Wiki.  Over 250 incidents, but not really noted until 1940.  I wonder how this connects to the (white) gun culture in the south.

Numerous black slave rebellions and insurrections took place in North America during the 17th, 18th, and 19th centuries. There is documentary evidence of more than 250 uprisings or attempted uprisings involving ten or more slaves. Three of the best known in the United States during the 19th century are the revolts by Gabriel Prosser in Virginia in 1800, Denmark Vesey in Charleston, South Carolina in 1822, and Nat Turner’s Slave Rebellion in Southampton County, Virginia, in 1831.