Describe prior restraint, and explain why it is important

What will be an ideal response?

An ideal response will:
1, Explain that prior restraint is the government's attempt to suppress the publication of materials by the press, for example, the Nixon administration's attempt to suppress the publication of the Pentagon Papers by the New York Times.
2, Discuss the circumstances under which government might want to engage in prior restraint, particularly when the materials under question might threaten national security or engage in criticism of the government.