I was making a lame attempt to be comedic. Depleted uranium is used in the M1's 120mm sabot penetrator. Also, I believe in the 30mm chaingun mounted on A-10's and AH-64's (Warthogs & Apaches). It has been theorized that the large amount of d.u. ordnance used in the Kuwait and Iraq theaters has caused some of the "mystery" illnesses among our troops. Nothing as of yet has been definitively proven.