http://www.slate.com/articles/technology/future_tense/2015/06/usa_freedom_act_surveillance_reform_is_finally_passing_but_it_s_not_enough.html

In October 2012, less than a year before the Snowden revelations, a small sculpture arrived at the Hirshhorn Museum in Washington, D.C. It was a surveillance camera—a replica of the cameras that Chinese officials had stationed around the home of Ai Weiwei, the artist. He carved it in marble. Dull white and a little more than a foot tall, the sculpture sat, largely unnoticed, until the end of its exhibit in late February 2013.