Free Beacon.com 
October 16, 2013
The federal government is studying how to use Twitter for surveillance on depressed people.
The University of California, San Diego (UCSD) began a study financed by the National Institutes of Health last month that will provide “population level depression monitoring” through the social media site.
The project, “Utilizing Social Media as a Resource for Mental Health Surveillance,” is costing taxpayers $82,800.
While Twitter has been used by government agencies, such as the Secret Service  andDepartment of Homeland Security , for national security related monitoring, the project suggests the social network can be used for public health surveillance as well.
Full story here.