In what became known as the "Pentagon Papers Case", the Nixon Administration attempted to prevent the New York Times and Washington Post from publishing materials belonging to a classified Defense Department study regarding the history of United States activities in Vietnam. The President argued that prior restraint was necessary to protect national security. This case was decided together with United States v. Washington Post Co.
Warning, this is a live recording of the supreme court hearing. Though interesting on historical and fly-on-the-wall perspectives, there are parts that are hard to hear, but worst of all, it is incomplete and stops in the middle of the hearing.