Chapter 25: What final change to the rules do the Gamemakers come up with?

Katniss and Peeta both take a handful of the poisonous berries and prepare to eat them in a dual suicide. The gambit works, and Claudius Templesmith is suddenly yelling through the sky that they ought to stop, and he announces a final change in rules: both will be the victors of the Seventy-fourth Hunger Games.