China-based systems caught probing US defense networks

While the US focuses its defenses on Iraq, Iran, and North Korea, someone or some organization with access to systems in China is focusing on the US defenses. More specifically, networks belonging to various US defense agencies and contractors have come under attack from systems that are physically located in China.  What isn't clear is whether those systems are under the direction of someone in China, or if they're doing the bidding (by way of malware)of another party located somewhere else in the world.  Alluding to what could be a harbinger of the sophisticated and highly blended digital threats to come for all of us, defense officials say that no individual piece of compromised data was classified.  But when combined, bits and pieces of unclassified information could add up to a jackpot of intelligence to certain adversaries.