Another report arrives courtesy of @EliseCLambert: Guy blew himself up cleaning a Civil War cannonball in his driveway midway between Richmond and Petersburg, Virginia:

The investigation by the Bureau of Alcohol, Tobacco and Firearms found that 53-year-old Sam White was working on the cannonball in his Chesterfield County driveway with a grinding tool. The tool ignited gunpowder residue, which exploded the shell. 

Part of the shell landed a quarter mile away. Sure, it happened a decade ago, but that’s pretty recent in the context of a war that ended 153 years ago.

Artillery photo