A Virginia man pleaded not guilty Wednesday after being accused by the FBI of stockpiling the largest number of explosives bureau officials have witnessed.

A Virginia man pleaded not guilty Wednesday in a federal case that accuses him of stockpiling the largest number of finished explosives in FBI history and using President Joe Biden’s photo for target practice.

Investigators say they found the largest collection of explosive devices in FBI history at the Virginia home of Brad Spafford, who has been arrested.

FBI investigation of a Virginia man led to what the agency calls its largest-ever seizure by number of finished explosive devices.

Prosecutors say federal agents found one of the largest stockpiles of homemade explosives they’ve ever seized when they arrested a Virginia man on a firearms charge last month.

The FBI is working to determine the plans of a 36-year-old suspect after investigators discovered over 150 explosives, primarily pipe bombs, on his 20-acre farm. According to the FBI, this is the largest cache of explosives ever found in the bureau’s more than 100-year history.