Further conflict between the U.S. and some UN members arose in 2002 and 2003 over the issue of Iraq. George W. Bush maintained that Iraqi President Saddam Hussein had not fulfilled the obligations he had entered into at the end of the Gulf War in 1991, namely to rid Iraq of all weapons of mass destruction (WMDs) and to renounce their further use. A series of inspections by the IAEA failed to find conclusive evidence that proved allegations that Iraq was continuing to develop or harbour such weapons.