Transformers 3 Movie Prequel - Foundation #3

Optimus Prime has reached his goal: the gates of Megatron's citadel. Prime has one thing in mind and he won't let Shockwave or Starscream slow him down—tonight, Megatron must die! Secrets are revealed and lines are crossed as the countdown to Transformers 3 ramps up. How far will Prime go to stop the Decepticons?