** FILE ** Briton Terry Pratchett said watching a 71-year-old man's assisted suicide, filmed for a BBC documentary, has reaffirmed his support for the right to die. Mr. Pratchett was diagnosed with early-onset Alzheimer's disease in 2007. (Associated Press)

** FILE ** Briton Terry Pratchett said watching a 71-year-old man's assisted suicide, filmed for a BBC documentary, has reaffirmed his support for the right to die. Mr. Pratchett was diagnosed with early-onset Alzheimer's disease in 2007. (Associated Press)