the US forces traversed the open desert. From 1991–1998 UNSCOM inspected Iraq and worked to locate and destroy WMD stockpiles. The team was replaced in 1999 with the United Nations Monitoring Verification and Inspection Commission, UNMOVIC. In 2002, Scott Ritter, a former UNSCOM weapons inspector, heavily criticized the Bush administration and the news media for relying on the testimony of alleged Iraqi nuclear scientist and defector Khidir Hamza as a rationale for invading Iraq. No militarily significant WMDs have been found in Iraq since the invasion, although several degraded chemical munitions dating to before 1991 have been. On June 21, 2006 a report was released through the United States Senate Select Committee on Intelligence, stating that since 2003, approximately 500 degraded chemical munitions have been discovered dating from before 1991 in Iraq, and "likely more will be recovered." The weapons are filled "most likely" with Sarin and Mustard Gas. However, the U.S. Department of Defense states that these weapons were not in usable condition, and that "these are not the WMDs this country and the rest of the world believed Iraq had, and not the WMDs for which this country went to war." In January 2006, The New York Times reported that "A high-level intelligence assessment by the Bush administration concluded in early 2002 that the sale of uranium from Niger to Iraq was 'unlikely.'" The Iraqi government denied the existence of any such facilities or capabilities and called the reports lies and fabrications, which was backed by the post-war prima facie case that no WMDs were evident or found. Former CIA officials have stated that the White House knew before the invasion that Iraq had no weapons of mass destruction, but had decided to attack Iraq and continue to use the WMD story as a false pretext for launching the war. The leaked Downing Street Memo, an internal summary of a meeting between British defense and intelligence officials, states that Bush Administration had decided to attack Iraq and to "fix intelligence" to support the WMD pretext to justify it. A transcript of a secret conversation between President Bush and PM Blair leaked by a government whistleblower reveals that the US and UK were prepared to invade Iraq even if no WMD were found. British officials in the memo also discuss a proposal by President Bush to provoke Iraq, including using fake UN planes, to manufacture a pretext for the