Propaganda is biased/misleading information, usually to promote/publicize something political.
There was no specific "group" in charge of propaganda in America, but it was definitely used in World War l and ll.
One of the most famous propaganda's, though, is Paul Revere's exaggeration of the Boston Massacre.
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Communication between agencies has changed because of 9/11 because now everyone is tense and on their toes of what had happened on that day because no one was expecting it and it was really, a big shock. Things between long distances people and especially more into protocols and rules, and now everyone is providing more secure and more high enlightened rules for people to go by so 9/11 doesn't happen again.
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