Bit off thread but someone else raised the depleted uranium topic. FAA has an interesting old Advisory Circular warning of possible poisoning due to ingestion of depleted uranium during accident investigation
http://rgl.faa.gov/Regulatory_and_Gu...E/AC20-123.pdf. Manufacturers give similar stern warnings about production and installation of d/u balance weights. US Military of course insists there is no hazard to human health from all the depleted uranium munitions blasted over Iraq!