The Washington Post reported on November 15, 2005 that it had obtained documents detailing how executives from major oil corporations, including Exxon-Mobil Corp., Conoco, Royal Dutch Shell Oil Corp., and the American subsidiary of British Petroleum met with Energy Task Force participants while they were developing national energy policy. Vice President Cheney was reported to have met personally with the Chief Executive Officer of BP (formerly British Petroleum) during the time of the Energy Task Force's activities. In the week prior to this article revealing oil executive involvement, the Chief Executives of Exxon-Mobil and ConocoPhillips told members of the US Senate that they had not participated as part of the Energy Task Force, while the CEO of British Petroleum stated that he did not know. Regardless of whether the executives were under oath, if these statements were knowingly and materially false and deceptive then they were illegal per the The Fraud and False Statements statute (18 U.S.C. 1001).[13] In response to questions regarding the article, Cheney spokesperson Lea Ann McBride was quoted as saying that the courts have upheld "the constitutional right of the president and vice president to obtain information in confidentiality." [14]

it helps to remember that this is all occurring from cheney's 10th day in office, and the National Energy Task Force issued its report in 2001 (May?), well before 9/11. but then (from halliburton Watch):

In July 2003, after two years of legal action through the Freedom of Information Act, Judicial Watch was finally able to obtain some documents from the task force. Those documents include maps of Iraqi and other mideast oilfields, pipelines, refineries and terminals, two charts detailing various Iraqi oil and gas projects, and a March 2001 list of "Foreign Suitors for Iraqi Oilfield Contracts."