Iraqi troops have been spotted between US and Iraqi battle lines wearing full chemical protection suits and unloading 50 gallon drums from trucks, a US intelligence official has saidThe official said US intelligence does not know what was in the drums, but fear it could be chemicals. Generals have said that the closer invading forces get to Baghdad, the higher the possibility that a cornered regime will launch an attack with chemical weapons or other weapons of mass destruction, which Saddam Hussein has denied he has