Photos That Captured the Most Chilling Moments in History

May 25, 1953

Upshot-Knothole Grable was a nuclear weapons test conducted by the U.S. This picture depicts the mushroom cloud from its detonation, with the cannon from which it was fired in the foreground. The test remains the only nuclear artillery shell ever actually fired in the U.S. nuclear weapons test program.

The More You Know

More than two percent of the American population was killed during the Civil War.
The needle at the top of the Empire State Building was originally intended as an anchor for blimps.
A typing error of a single hyphen in the coding of the Mariner I rocket, caused it to blast before take off and cost NASA $630 million dollars.
Martin Luther King Jr and Anne Frank were born in the same year.

Post originally appeared on Upbeat News.