A few weeks after he landed in Iraq, Bremer informed Hadley [Rice's deputy] that he didn't want to subject his decisions to the "interagency process", a bureaucratic safety valve that allowed the State Department, the Pentagon, the CIA and the NSC to review and comment on policies. Bremer said he couldn't wait around for the approval from the home office. Rice and Hadley were reluctant to remove Bremer's very long leash, but he was the man on the ground. And after the Garner debacle, the White House wanted a take-charge guy. All right, Hadley told him, you don't have to go through the interagency process. But make sure you run the big stuff by us first.(I have a long, boring review of that book on my blog).
Bremer told confidants in Baghdad he didn't want to "deal with the Washington squirrel cage". He was a presidential appointee who reported to the president through the secretary of defense. He had no obligation to answer to anyone else. When Paul Wolfowitz or Doug Freith sent messages to him, Bremer directed his deputies to respond.
If Washington wanted something from Bremer's underlings, the request had to be approved by Bremer himself...
I don't think anybody could have predicted that these people would take an airplane and slam it into the World Trade Center, take another one and slam it into the Pentagon; that they would try to use an airplane as a missile, a hijacked airplane as a missile.