As America prepares for the end of the war and the creation of thousands of veterans, another mystery lingers in the background: a decade on and no one knows for certain what the awful, persistent sickness was that followed home the veterans of our last major combat operation.It’s doubtful that there will ever be any strict consensus as to the root causes of Gulf War Syndrome, as it’s ominously called, especially considering the catalog of chemicals Gulf War vets were exposed to: nerve gas antidote pills, military strength pesticides, and chemical weapons.But another culprit, depleted uranium, a bi-product of enriched uranium that was used in American munitions, was the focus of military preparations before the war. We dug up some old Army videos for “Depleted Uranium General Awareness Training” that shows just how under-prepared soldiers may have been to the hazards of this potentially pretty nasty stuff.Watch the rest at Motherboard.