This case presents the question whether the District Court for the District of Columbia should release to respondents certain tapes admitted into evidence at the trial of petitioner's former advisers. Respondents wish to copy the tapes for broadcasting and sale to the public. The Court of Appeals for the District of Columbia Circuit held that the District Court's refusal to permit immediate copying of the tapes was an abuse of discretion. United States v. Mitchell, 179 U. S. App. D. C. 293, 551 F. 2d 1252 (1976). We granted certiorari, 430 U. S. 944 (1977), and for the reasons that follow, we reverse.

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