Inmate Frank Van Den Bleeken, seen here in court last autumn, says he wants to die because he sees no progress in the mental problems that were linked to his crimes of murder and rape. Herman Ricour/AP hide caption

itoggle caption Herman Ricour/AP

Stefan Daniel is a 51-year-old German clinical psychologist with multiple sclerosis. He has decided that he will end his life, by taking a barbiturate while sitting in his own living room, when he can no longer see or speak. Esme Nicholson for NPR hide caption

itoggle caption Esme Nicholson for NPR

Protesters in Brussels, Belgium, march on Feb. 2 against a proposed law that would allow terminally ill kids to choose euthanasia. Virginia Mayo/AP hide caption

itoggle caption Virginia Mayo/AP

Tony Nicklinson's wife, Jane, wipes his tears as he learns that a court has denied him the right to medically assisted suicide on Aug. 16, 2012. Matt Cardy/Getty Images hide caption

itoggle caption Matt Cardy/Getty Images