Actually, what with all the dust floating around, holding your breath might be advisable. Anyhow, so is the DU the core or the whole projectile? Also, it seems that it is intended to splinter and spread dust anyhow (to make it 'sharpen') so the army is hardly likely to get rid of it because its most favouralbe characteristic happens to cause a few problems.

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There's no honorable way to kill, no gentle way to destroy. There is nothing good in war. Except its ending.