Glenn Greenwald, best known for his series in "The Guardian" detailing classified information about global surveillance programs based on top-secret documents provided by Edward Snowden, spoke speak at the University of Utah on Tuesday, April 7, 2015.

Greenwald, a Pulitzer-prize winning journalist who sparked a worldwide debate over freedom of speech, provided the keynote address during Secrecy Week, a week of events sponsored by the College of Humanities exploring government surveillance in the U. S.