In apparent response to controversial trade agreements being negotiated by the Obama Administration, Anonymous has moderately doxxed some 4,200 US Census Bureau employees nationwide. Much of the data was innocuous or otherwise publicly available, in that it most likely could not be used to blackmail or steal the identities of the employees who were exposed.
Here are page 1, page 2, page 3, and page 4 of the documents.
A representative of the Census Bureau told the Register:
The US Census Bureau is investigating an IT security incident relating to unauthorized access to non-confidential information on an external system that is not part of the Census [...]