CREDIT: Jonathan Hayward, The Canadian Press Don Appleby died of his injuries suffered in an Oct. 12 explosion while he was trying to make a concentrated oil using marijuana and butane. Don Appleby's fight against the aids virus that was sapping him was made more difficult by a tragic paradox. While the Ottawa man was one of the few Canadians who could legally smoke marijuana for medicinal purposes, he could rarely afford it due to his minuscule disability pension. In the end, he was killed in the struggle to produce the drug that was helping him survive. On Oct. 12,...