About 180 Civil War-era cannonballs found on the grounds of the nation's oldest arsenal have been detonated in an upstate New York quarry.
Army 1st Sgt. Kieran Dollard of the Fort Drum-based 725th Explosive Ordinance Disposal Unit says the cannonballs were found on the grounds of the Watervliet (wah-ter-vuh-LEET') Arsenal, on the Hudson River just north of Albany.
The explosives were moved 40 miles north to a quarry in South Glens Falls, where they were detonated Tuesday.
Dollard says the cannonballs may have had some black powder residue inside, so they had to be destroyed.
A spokesman for the U.S. Army arsenal says the cannonballs had been found on the grounds during construction projects over the years and stored in the facility's museum, which closed last fall.