Police arrested a man in California today who turned his home into a bomb factory. He had numerous bombs already completed and enough material to make dozens more. Law enforcement officials say his bombs had the explosive power of the London subway bombings in 2005 that killed 52 people. Police even uncovered a quantity of PETN, the same explosive used in the recent cargo plane bombing plot.

In total, this is the largest cache of explosives ever discovered inside the United States.

Security officials at the nation’s largest nuclear power plant detained a contract worker with a small explosive device in the back of his pickup truck.

The worker was stopped and detained at the entrance of the Palo Verde Nuclear Generating Station. Officials then put the entire plant on lock-down barring anyone from entering or exiting the facility.

Authorities described the device as a small capped pipe that contained suspicious residue. The Maricopa County Sheriff’s Office rendered the device safe and investigators began interviewing the worker.