We've been following the story of Jahi McMath, the 13-year-old girl in Oakland declared brain dead following complications from surgery.
Her family firmly believes Jahi is still alive, and they successfully fought for the legal right to remove her from a hospital which had planned to take her off a ventilator. Meanwhile in Texas, a hospital is keeping a brain dead pregnant woman named Marlise Munoz alive to save the baby, despite her family's wishes.
For more on the very difficult questions which arise in these two cases, we're joined by Benedict Carey of the New York Times.