Dr. Chang's talk, "The Last Email," described the cyber world we could be approaching, and highlighted the consequences of future cyber attacks. These attacks could be possible because of network and software vulnerabilities and the human tendency to ignore security issues. Dr. Chang makes a plea for more cyber defenders, and describes the need for the development of a science of cyber security. Our future is not set, explains Dr. Chang, but we must start now to prepare for a cyber world which serves us well and is not the victim of frequent attacks and cyber crime.