the us claimed that Iraq had wmds, but it was later revealed Iraq has no usable wmds (they had some sarin that expired in the 70s) and the us had a congressional hearing where the armed services confirmed that they considered the unusable wmds as active wmds, even though they could not be used. it was not a conspiracy later proven true like the Tonkin incident, but just using the vague definition of WMD (there is no offical one delcared by the UN) to the army's advantage