 Not too long ago, the FBI tried running its own smartphone company. None of us had run a tech company, but we recognized we're going to have to do this. The FBI got criminals to buy encrypted cell phones, and then they used the phones to spy on those very criminals. This idea was crazy from the beginning. I'm Nick Fountain. Today on Planet Money, how the FBI created the largest sting operation in its history by creating a phone that criminals would love.