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Project Overkill was AIVAS' name for the project of removing Threadfall from Pern. The first part of his plan had the bronze dragons of Pern taking the engines of the Yokohama, Bahrain and Buenos Aires to the Red Star to alter its orbit around Pern. The second part of his plan had the green dragons taking biologists to the Red Star to seed it with a parasite that would destroy Thread in the Oort Cloud.