Led by Secretary Hillary Clinton, the US State Department has invested heavily in social media and moved it front and centre into its diplomatic outreach.
The US State Department has over 190 social media accounts with more than half owned by individual embassies. The State department also uses Facebook, Twitter, Flickr, Tumblr, and YouTube.
It has designated January 2012 as 21st Century Statecraft month.
Twenty-first Century Statecraft complements traditional foreign policy by harnessing and adapting today's digital networks and technologies.
State's efforts are comprehensive and impressive. Read more at Leveraging the Tools of 21st Century Statecraft | U.S. Department of State Blog