Spetsnaz to Bekka makes a good story and Sada had a book to sell. The airliners at Baghdad airport would have been tested at Baghdad for any residual chemicals. Notice that Sada refused to name the pilots of those flights? Until he names them and they confirm the flights were transporting WMD then it remains firmly speculation.
Flights of Iraqi airliners were noted going to Syria to provide assistance after a dam broke. Iraq provided aid to Syria during this period. Sada could simply be riding his book on the back of those flights and the unamed aircrew.
Sada said they used the breaking of the dam as cover for explaining the “assistance” from Iraq.
Dams can be broken for convenience, it doesn’t take an act of God.