Ten Sources off the top of my head:
01. Author/Biographer Mickey Herskowitz
02. Former Treasury Secretary Secretary Paul O'Neil
03. Former WHite House Advisor Richard Clarke
04. Former Wall Street Journal Reporter Ron Suskind
05. The Downing Street Memo
06. Senator Chuck Rangel (DNY)
07. The Project for a New American Century (PNAC) Manifesto
08. Retired Army General and former director of the NSA William Odom
09. Author Robert Woodward
10. Author James Bamford
