There were reports that Syria again moved them to Chad in civilian air flights. sorry, just my memory here and I can't confirm those reports.
Let's not forget, that Syria has 3 major compounds that are suspected WMD sites.
Moving WMDs to Syria doesn't make sense. Firstly, everyone knew that our satellites were watching. Secondly, Syria's leadership is fearful so it would have to have been kept from them. And thirdly, Saddam is unlikely to have let his favorite toys get so far away. Think of that. Would he really have trusted the Russians to take his WMDs away? He had spent years successfully hiding them from the UN inspectors inside Iraq and so had the means to keep hiding them.