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In page Events leading to the attack on Pearl Harbor:

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In June 1941, German and Italian consulates were closed, and there were suggestions Japan's should be closed, as well. They were not, because they continued to provide valuable information (via MAGIC) and neither President Franklin D. Roosevelt nor Secretary of State Cordell Hull wanted trouble in the Pacific.[3] Had they been closed, however, it is possible Naval General Staff, which had opposed the attack from the outset, would have called it off, since up-to-date information on the location of the Pacific Fleet, on which Yamamoto's plan depended, would no longer have been available.[4]