A malware-laced USB stick, inserted into a military laptop at a base in Afghanistan in 2008, led to what has been called the worst military breach in US history, and to the creation of the US Cyber Command. The laptop was attached to the Department of Defense’s Central Command network and the malware – which had been planted by suspected Russian cyber spies – soon infected other DoD systems, both classified and unclassified.  “These are the warfighting networks that we’re using for US Central Command,”

Source: The Register