WASHINGTON — Forty years after they hit front pages, the Pentagon Papers will be released by the government next month. But wait! Eleven words of the finally declassified history of U.S. involvement in Vietnam will remain secret.

The National Declassification Center will only say that the 11 words are all on one of the work’s 7,000 pages.

The resulting public uproar led to a major legal victory for press freedom when the Supreme Court upheld the right of newspapers to publish the papers. The upcoming release will be the complete study, unlike the version leaked by former Defense Department special assistant Daniel Ellsberg.