Leon was appointed to the U.S. District Court for the District of Columbia in 2001 by President George W. Bush, and took office in 2002. He previously served as a top Justice Department official and as an attorney advising congressional probes into the Iran-Contra scandal of the 1980s and the Whitewater controversy of the 1990s.
Several of Leon's well-known rulings have proscribed federal authority. In 2012 he ruled grisly U.S. Food and Drug Administration labels on cigarette packs would violate the First Amendment. In the first ruling of its kind, Leon ordered in 2008 the release of five Algerian men held at Guantanamo Bay since 2002 after finding a lack of evidence they were terrorists. He dismissed the government's reliance on a classified document attributed to an unnamed source.
Although he granted the phone program injunction, Leon denied Klayman's bid for an injunction against the NSA's PRISM Internet surveillance program.
Read Leon's Decision: