This article summarizes a variety of other media coverage. Once again, China is alleged to be the source of the attacks with little or no data related to the true motive or source of the attacks:
"According to the same source, there is still no indication whether the Chinese hackers were sponsored by the government in Beijing or if they were working independently. This seems to be a recurring question that never gets its answer, even though it is not the first time that attacks on U.S. government systems originate in China."
Cyber-Attack Cripples Critical U.S. Military Networks