'The United States must order an end to illegal use of depleted uranium munitions DU is a waste product of the process that produces enriched uranium for use in atomic weapons and nuclear power plants. Much like natural uranium, it is both toxic and radioactive.
When DU burns, it spews tiny particles of poisonous and radioactive uranium oxide in aerosol form, which can then travel for miles in the wind. Humans can ingest or inhale the small particles. Even one particle, when lodged in a vital organ--which is most likely to happen from inhalation-- can cause illnesses from headaches to cancer.'
These videos present the background to depleted uranium: