According to Wikipedia®...

Titan Rain was the U.S. government's designation given to a series of coordinated attacks on American computer systems since 2003.

The attacks were labeled as Chinese in origin, although their precise nature (i.e., state-sponsored espionage, corporate espionage, or random hacker attacks) and their real identities (i.e, masked by proxy, zombie computer, spyware/virus infected) remain unknown.

The designation "Titan Rain" has been changed, but the new name for the attacks is itself classified if connected with this set of attacks.

In early December of 2005 the director of the SANS Institute, a security institute in the U.S., said that the attacks were most likely the result of Chinese military hackers attempting to gather information on U.S. systems.

Titan Rain hackers gained access to many U.S. computer networks, including those at Lockheed Martin, Sandia National Laboratories, Redstone Arsenal, and NASA.

According to a story by Rober Blincoe at VNUNET

"There is a problem with state-sponsored electronic terrorism," he told the audience.

"No matter how much collaboration you have internationally, if you have a state-sponsored terrorist coming out of China or Russia you are not going to get them.

"If they are state-sponsored e-criminals they are doing it for a purpose. And you cannot extradite them."

A formal complaint about Professor Walker's remarks was made to Gloria Laycock, director of the UCL Centre for Security and Crime Science.

BREITBART Online confirms...

A systematic effort by hackers to penetrate US government and industry computer networks stems most likely from the Chinese military, the head of a leading security institute said.

The attacks have been traced to the Chinese province of Guangdong, and the techniques used make it appear unlikely to come from any other source than the military, said Alan Paller, the director of the SANS Institute, an education and research organization focusing on cybersecurity.

"These attacks come from someone with intense discipline. No other organization could do this if they were not a military organization," Paller said in a conference call to announced a new cybersecurity education program