As a doctor at the end of a 24-hour shift in the intensive care unit, it's usually easy for me to fall asleep. Exhaustion hits me like a rock and it doesn't matter that the morning sun is pouring into my bedroom. After so many long hours of fighting for life and pushing back death, when I finally hit my bed and close my eyes, the next day arrives in an instant. Except for that one day when I couldn't sleep no matter what I tried. Saddened from seeing the familiar turmoil as my patients' families were caught unprepared, confused and distraught by an unexpected medical disaster, I tossed and...