Accidental Troll

There are dust-ups over all sorts of things, but they rarely have actual scientific merit. The only realistic secondary hazard (i.e., other than the impact of the shell) posed by DU is to people living in the area of impact. The military seems to have underestimated the likelyhood of pulverized DU getting into the water supply or being breathed in, but radioactivity isn't the hazard.