Answer:
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.
Explanation:
A. British Military Massachusetts Governor Gage
The Chinese worked on railroads when they migrated to america
Democratic-Republican Party before they split.
