Late on Wednesday, the office of the UK's prime minister said David Cameron had agreed in a telephone call with Mr Obama that the use or threat of chemical weapons was "completely unacceptable and would force them to revisit their approach so far".
The main treatment is injections of a chemical to cut levels of testosterone - the driving force of many prostate cancers - but it causes side effects.
Instead, he started his own company and spent the next few years buying and selling a weed killer from Helena Chemical, competing with Helena's own sales force for meager margins.
He and Berrard are buying up businesses in the industrial cleaning, waste and chemical sectors, aiming to expand the combined Swisher Hygiene entity into a nationwide force, all with the same red-and-white logo.
While slightly smaller forces were capable of prevailing without a significant increase in risk in the base case of the analysis, a larger force was judged necessary to conduct these operations with acceptable risk when either enemy chemical weapons were used or shorter warning times were played.