Early Saturday morning, Jerry Drake Varnell, a 23-year old with a history of mental illness, allegedly dialed a phone number on a throwaway cellphone that he thought would detonate a 1,000-pound bomb in a cargo van parked in downtown Oklahoma City.

Nothing happened, so he called the number again. And again.

Then, agents with the FBI and Joint Terrorism Task Force arrested him.

The bomb was in fact a fake, constructed from inert items, provided by an undercover FBI agent who told Varnell he would help him procure explosives for a bombing plot meant to spark a revolution. The number Varnell called belonged to a cellphone in possession of law enforcement, who were awaiting the call nearby to arrest him.