Glenn Greenwald is a former constitutional and civil rights litigator in New York City, first at the Manhattan firm Wachtell, Lipton, Rosen & Katz, and then at the litigation firm he founded, Greenwald, Christoph. Greenwald litigated numerous high-profile and significant constitutional cases in federal and state courts around the country, including multiple First Amendment challenges. aclu.org:80
The definitive Wikipedia entry for Glenn Greenwald. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Glenn_Greenwald