Report on torture by the CIA
In 2014, over objections from the Obama administration, she took to the Senate floor to release a comprehensive report on torture by the CIA following the Sept. 11 attacks.
"Releasing this report is an important step to restore our values and show the world that we are, in fact, a just and lawful society," Feinstein said.
https://www.npr.org/2023/09/29/1125664267/dianne-feinstein-obituary