Redaction nation: US history brims with partial deletions

Attorney General William Barr leaves his home in McLean, Va., on Monday, April 15, 2019. Barr told Congress last week he expects to release his redacted version of special counsel Robert Mueller's Trump-Russia investigation report "within a week." (AP Photo/Jose Luis Magana)
A motorcade carrying Attorney General William Barr arrives at the Department of Justice, Monday, April 15, 2019, in Washington. Attorney General William Barr told Congress last week he expects to release his redacted version of special counsel Robert Mueller's Trump-Russia investigation report "within a week." (AP Photo/Patrick Semansky)
Special counsel Robert Mueller arrives at his office in Washington, Monday, April 15, 2019. Attorney General William Barr told Congress last week he expects to release his redacted version of the special counsel's Trump-Russia investigation report "within a week." (AP Photo/J. Scott Applewhite)
The redacted, right, and the unredacted versions of the biographical intelligence file report on Chilean dictator Augusto Pinochet from 1975 is photographed on April 15, 2019, in Washington. In 2003, the Defense Intelligence Agency declassified the documents that included a biographical sketch of Pinochet. Attorney General William Barr’s announcement that he would release a “redacted” version of Mueller’s findings will likely set off a long debate over what’s behind the darkened patches. (AP Photo/Jon Elswick)

NEW YORK — Somewhere in the shadows of federal bureaucracy, there was an issue about the drinking habits of Augusto Pinochet.