Sometimes Lily had dreams, hopeless nightmares in which she reached for Maddy, grabbed her arm at the last minute and helped her duck into a classroom, behind a door, out the window. But even her dreaming self knew it was futile, that any moment the four men in black uniforms would come around the corner, that two of them would grab each of Maddy’s arms and escort her down the hallway, that Lily’s last glimpse of her sister would be a flash of blonde pigtails before the doors closed