It's nice to see a real life example of the prisoner's dilemma going against the Nash Equilibrium:

>Prosecutors had a weak hand, and they knew it. As a December 3, 2013, trial date approached, the Feds made Kane and Nestor separate but identical offers: The first one to agree to testify against the other would walk away with five years of probation and no jail time.

>The old gambling buddies had one more game to play together. It was the Prisoner's Dilemma. Without speaking, they both arrived at the optimal strategy: They refused the offer. A few months later, the Justice Department dropped the last of the charges, and they were free.