Hacks against Defense Department and other U.S. agencies stretching back to 2003 were codenamed Titan Rain. The attacks breached hundreds of networks, including Departments of State, Energy and HomelandSecurity. Attackers coordinated from Chinese computers, investigators found. Lockheed Martin and NASA were also struck in what many experts called an attempt to glean information on systems. Researchers were able to trace the attacks back to the Chinese province of Guangdong, but the individuals behind the operation still remain a mystery.”]