Via the Washington Post, here are the top 10 key findings of the Senate torture report:
In plain English: The torture was far more brutal than we thought, and the CIA lied about that. It didn't work, and they lied about that too. It produced so much bad intel that it most likely impaired our national security, and of course they lied about that as well. They lied to Congress, they lied to the president, and they lied to the media. Despite this, they are still defending their actions.
The rest of the report is just 600 pages of supporting evidence. But the core narrative that describes a barbarous, calculated, and sustained corruption of both our national values and our most fundamental moral principles is simple. We tortured prisoners, and then we lied about it. That's it.