On November 8, 2002, the U.N. Security Council passed Resolution 1441, giving Iraq "a final opportunity to comply with its disarmament obligations" including unrestricted inspections by the United Nations Monitoring, Verification and Inspection Commission (UNMOVIC) and the International Atomic Energy Agency (IAEA). Saddam Hussein accepted the resolution on November 13 and inspectors returned to Iraq under the direction of UNMOVIC chairman Hans Blix and IAEA Director General Mohamed ElBaradei. Between that time and the time of the invasion, the IAEA "found no evidence or plausible indication of the revival of a nuclear weapons programme in Iraq"; the IAEA concluded that certain items which could have been used in nuclear enrichment centrifuges, such as aluminum tubes, were in fact intended for other uses. UNMOVIC "did not find evidence of the continuation or resumption of programmes of weapons of mass destruction" or significant quantities of proscribed items. UNMOVIC did supervise the destruction of a small number of empty chemical rocket warheads, 50 liters of mustard gas that had been declared by Iraq and sealed by UNSCOM in 1998, and laboratory quantities of a mustard gas precursor, along with about 50 Al-Samoud missiles of a design that Iraq claimed did not exceed the permitted 150 km range, but which had travelled up to 183 km in tests. Shortly before the invasion, UNMOVIC stated that it would take "months" to verify Iraqi compliance with resolution 1441.