Today's gathering is particularly important because I must speak bluntly and urgently, about the single most important part of our jobs: preventing terrorist attacks on American soil. Our success or failure in this endeavor will define in the eyes of some President Bush and his legacy. Right or wrong, this is a task that will also define my government career and, indeed, to some degree my professional life. It will be the legacy of every one of us who is serving in this Administration. Terrorists chose to attack us. But it is we who must now choose — today, tomorrow, the day after that and the day after that, until the end of our government service — to do everything in our powers to stop them from striking again.

Speech to U.S. Attorneys' National Security Conference (January 11, 2007)