EPIC and a coalition of civil rights organizations have sent a letter to the Acting Secretary of Homeland Security strongly opposing the Extreme Vetting Initiative. A similar letter was sent by technical experts. The government's 'Extreme Vetting' initiative uses opaque procedures, secret profiles, and obscure data including social media post, to review visa applicants and make final determinations. EPIC has warned against both the government's use of social media data and secret algorithms to profile individuals for decision making purposes. EPIC is also pursuing a FOIA request for details on the relationship between the Immigration and Customs Enforcement agency and Palantir, a company that provides software to analyze large amounts of data.