oversight responsibility, would conduct a "thorough and bipartisan review" of Iraqi WMD and ties to terrorist groups. On June 20, 2003, Senator Roberts and Senator John D. Rockefeller IV (D-WV), the Committee's vice chairman, issued a joint press release announcing that the committee would conduct a detailed review of the Iraqi WMD intelligence process, including the following areas: the quantity and quality of U.S. intelligence on Iraqi weapons of mass destruction programs, ties to terrorist groups, Saddam Hussein's threat to stability and security in the region, and his repression of his own people; the objectivity, reasonableness, independence, and accuracy of the judgments reached by the Intelligence Community; whether those judgments were properly disseminated to policy makers in the Executive Branch and Congress; whether any influence was brought to bear on anyone to shape their analysis to support policy objectives; and other issues we mutually identify in the course of the Committee's review. Investigation committee membership The following nine Republicans were members of the Committee at the time the investigation was launched: Committee Chairman Pat Roberts (R-KS), Orrin Hatch (R-UT), Michael DeWine (R-OH), Kit Bond (R-MO), Trent Lott (R-MS), Olympia Snowe (R-ME), Chuck Hagel (R-NE), Saxby Chambliss (R-GA), and John Warner (R-VA). The following eight Democrats made up the rest of the Committee: Vice-Chairman Jay Rockefeller (D-WV), Carl Levin (D-MI), Dianne Feinstein (D-CA), Ronald Wyden (D-OR), Dick Durbin (D-IL), Evan Bayh (D-IN), John Edwards (D-NC), and Barbara Mikulski (D-MD). Chronology In the course of the investigation, Committee staff reviewed more than 30,000 pages of documentation provided by the intelligence community. The Committee requested that it be supplied copies of the President's Daily Briefs (PDBs) concerning Iraq's WMD capabilities and ties to terrorism, but the White House denied that request. An article by journalist Murray Waas has described a specific controversy over the PDB for September 21, 2001, which allegedly said that the US intelligence community had "no evidence" linking Saddam Hussein to the September 11 attacks, and "scant credible evidence" that Iraq had any significant collaborative ties with al Qaeda. Committee staff also interviewed more than 200 people, including intelligence analysts and senior officials with the Central Intelligence Agency (CIA), Defense Intelligence Agency, the Department of Defense, and other federal entities involved in intelligence gathering and analysis. The Committee also held a series of hearings on the intelligence concerning Iraqi WMD and ties to terrorism. On February 12, 2004, Senators Roberts