A couple of points about some of the things raised in this thread so far:

I believe that Winston Churchill was an "embedded war-correspondent" with an armoured train in the Boer War when he was captured.

Bev and Jerry, the pilots are waving to let the Catapult Officer know that all hands are clear of controls prior to launch.

Use of chemical/biological weapons against highly mobile columns would not be very effective - as I have said in other threads, such weapons are very unreliable and very unpredictable. My bet is, that if he is going to use them it will be in Baghdad - it will be very much as a last ditch thing as they will be as great an impediment to his own troops as they will to the coalition troops.

On the subject of troops taking part - US, UK, Czechs, Poles & Australians. The former Warsaw Pact contingents are chemical and biological warfare specialists.