sentences:  Daniel Ellsberg, a former RAND consultant who had secretly copied "The Pentagon Papers", which described the history of the United States' military involvement in Southeast Asia, gave a copy to Howard and Roslyn Zinn.Along with Noam Chomsky, Zinn edited and annotated the copy of "The Pentagon Papers" that Senator Mike Gravel read into the Congressional Record and that was subsequently published by Beacon Press.Announced on August 17 and published on October 10, 1971, this four-volume, relatively expensive set became the "Senator Gravel Edition," which studies from Cornell University and the Annenberg Center for Communication have labeled as the most complete edition of the Pentagon Papers to be published.