Simply the must - "Twitter for Diplomats: A Guide to the Fastest Growing #DigitalDiplomacy Tool" by @andreas212nyc http://www.diplomacy.edu/blog/twitter-diplomats-guide-fastest-growing-digital-diplomacy-tool …
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more