Unexploded artillery shell unearthed at Gettysburg. It may have been a case of friendly fire

Steven Brann was out Wednesday on the Gettysburg battlefield in Pennsylvania, sweeping the ground with a metal detector ahead of crews that are rehabilitating a famous part of the Civil War park.

source https://www.cnn.com/2023/02/09/us/civil-war-shell-gettysburg-pennsylvania/index.html