"When the former KGB agent Alexander Litvinenko was found to have been poisoned by radioactive polonium 210 last week, there was one group that must have been particularly horrified: the tobacco industry.

"The industry has been aware at least since the 1960s that cigarettes contain significant levels of polonium."

This is the start of an op-ed piece by Robert N. Proctor, published in the New York Times and the International Herald Tribune. You can read the entire article by clicking here.