During the lead-up to the Iraq War, the United States had alleged that Iraq owned bioreactors, and other processing equipment to manufacture and process biological weapons that can be moved from location to location either by train or vehicle. Subsequent investigations failed to find any evidence of Iraq having access to a mobile weapons lab.

David Christopher Kelly was a Welsh scientist and authority on biological warfare (BW). A former head of the Defence Microbiology Division working at Porton Down, Kelly was part of a joint US-UK team that inspected civilian biotechnology facilities in Russia in the early 1990s and concluded they were running a covert and illegal BW programme. He was appointed to the United Nations Special Commission (UNSCOM) in 1991 as one of its chief weapons inspectors in Iraq and led ten of the organisation's missions between May 1991 and December 1998. He also worked with UNSCOM's successor, the United Nations Monitoring, Verification and Inspection Commission (UNMOVIC) and led several of their missions into Iraq. During his time with UNMOVIC he was key in uncovering the anthrax production programme at the Salman Pak facility, and a BW programme run at Al Hakum.