Almost everyone will be in the care of a nurse at some point, but most people have no idea what nurses really do. It's often said that nurses are the backbone of the American healthcare system. Almost everyone will be in the care of a nurse at some point, but most people have no idea what nurses really do. The new book, The Shift: One Nurse, Twelve Hours, Four Patients' Lives, gives an insider's view of a typical shift at a cancer ward, including all the fears, joys and heartbreaks. Tune in to hear from author Theresa Brown, RN, a frequent contributor to the New York Times opinion page. Bonus! How Caffeine Affects ED