Skyler Philippi (24) of Columbia, TN, pleaded guilty to attempting to use a weapon of mass destruction to destroy an energy facility. Philippi told a confidential FBI source in July 2024 that he wanted to attack several electricity substations to "shock the system." The FBI began to collect information about Philippi's plan with other undercover agents. In Nov 2024, Philippi and undercover employees drove to his intended Nashville launch site and prepared to fly a drone that Philippi believed had three pounds (1.4 kilograms) of C-4 plastic explosive attached to it. The material had been provided by the undercover employees. When he was arrested, Philippi had the drone powered up and was preparing to attach the armed explosive device to it as undercover employees pretended to be lookouts for him.