The explosion in computer interconnectivity, while providing great benefits, also poses enormous risks. Terrorists or hostile foreign states could launch computer-based attacks on critical systems to severely damage or disrupt national defense or other critical operations. After reviewing the president's plan for homeland security, GAO found that many challenges remain. Among them: Developing a national critical infrastructure protection strategy.
Improving analytical and warning capabilities.
Improving information sharing.
Addressing pervasive weaknesses in federal information security. The nation's critical infrastructures are sitting ducks, and people are whining about the stock market. How secure are your services? How many different ways can you drive to work? What if the US interstate highway system was closed for a month while telecom, television, radio, and electricity services were offline? Would that affect you? GAO: Critical Infrastructures At Great Risk [PDF] | 
