Among the disclosures in the book, which drew from numerous sources and more than 19,000 internal government documents, one was that the overthrow of Saddam Hussein and the U.S. occupation of Iraq was planned from Bush's first U.S. National Security Council meeting in January 2001, soon after Bush took office. This lay in contrast to the perception that concerns over Iraq came to the forefront after the September 11 attacks in 2001. Administration officials have contended that O'Neill confused contingency plans with actual plans for invasion.