The Seventh Circuit Court of Appeals recently issued this heavily redacted opinion in a FISA case.
Of the little-more-than-12-page opinion, page 4 is redacted entirely, pages 2, 3, 5, and 12 are heavily redacted, and approximately 1/3 to 1/2 of each of the remaining pages is blacked-out.
Other than some general law, I'm not sure there is much to take away from this opinion. But it does serve as a good reminder that not all authority is created equal, and some cases are more helpful than others. When drafting briefs and discussing cases, stick with cases that are as factually similar as possible--assuming you can figure out what the facts are!