 It does emphasize that we live in a world of dependency and vulnerability and that disruption can and will happen. And IT is at the core of our day-to-day operations, our businesses, our economies, everything about our lives. So this will happen and will continue to happen. A mail carrier was shot and killed as she walked a route just before noon Friday on Chicago's South Side. Octavia Redmond was 48. She delivered the mail for more than 15 years. This is CBS News.