Groups Call for Closure of NSA’s Backdoor to Internet User’s Data joined the New America Foundation and 22 non-profit and technology groups to lend support to the Massie-Lofgren amendment to the Department of Defense Appropriations Act. The amendment would shut the NSA's backdoor to search the private data of Internet users by prohibiting the use of appropriated funds for the warrantless searches. The amendment also keeps funds from being used to insert security vulnerabilities into prodcuts for surveillance purposes. The letter is available here