Within days of Operation Desert Fox, Iraq said it would not let Unscom inspectors back in.
Calls for the body to be restructured or replaced grew as the row about its role in US and other countries' intelligence gathering increased.
In June 1999, Unscom head Richard Butler stepped down as his contract ended.
Six months later, Unscom's successor body, Unmovic, was established, but Iraq refused it entry.
With no inspections in Iraq, uncertainty grew about possible new weapons programmes.