In National Aeronautics and Space Administration v. Nelson, No. 09-530 (U.S. Jan. 19, 2011) [pdf], the Supreme Court concluded that employees of government contractors can be subjected to the same background checks conducted on federal civil servants, without violating the privacy protections in the Constitution. The decision specifically rejects a challenge to questions about the past use of illegal drugs, including whether prospective contractor employees had previously received treatment or counseling for drug use.