Among other things, he points out what we already knew, that the aim of the torture was purely political -- to prove a Saddam-terrorism link in time for the U.S. elections. And he points out that it's idiotic to argue that stopping the torture will put us at risk, when the Bush people themselves stopped the program four years ago. By that time, of course, Bush was heading back to the White House for his second term. No further torture was needed.
And here are more Bush administration sources substantiating the link between the torture program and the need to prove the Iraq-terror link.
Hat tip to Kos.