Grief and anger, like clouds of a coming storm, moved back and forth across the landscape of Mayor Daley's face in public appearances last week. And why not? Michael Scott, his longtime, loyal friend, was dead. Suddenly. Violently. By his own hand, according to the Cook County medical examiner. When we lose someone we love, particularly like that, don't we ask ourselves what it was we failed to see? Or failed to do? Our own helplessness adds rage to sorrow. It's understandable. It's human. That's the best explanation I can come up with for what happened Wednesday at the mayor's...