Members of the Bush Administration denied that the government was prepared for planes being flown into buildings when in fact different government agencies had been rehearsing for just such an event for at least two years prior to 9/11. These mock events were not held to determine what to do if such an attack were to occur. Instead they were designed to identify what needed to be done to ensure that the attacks proceeded as planned. To identify what systems had to fail or be co-opted for the 9/11 plan to be successful.

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