The importance of adequate backups is illustrated in an example from a 2005 CERT report about a system administrator angry about employment decisions at the defense manufacturing firm where he worked. Upon learning that he would be given a smaller role managing the computer network that he alone had developed and managed, he took the initiative to centralize the software supporting the company’s manufacturing processes on a single server. Then he intimidated a coworker into giving him the only backup tapes for that software. When the system administrator was terminated, a logic bomb that he had previously planted detonated and deleted the only remaining copy of the critical software from the company’s server. The cost? The company estimated that the damage exceeded $10 million, which led, in turn, to the layoff of some 80 employees. More case stories can be found at www.cert.org.