U.S. says Chinese government behind cyberespionage

The Chinese government and military have engaged in widespread cyberespionage targeting U.S. government and business computer networks, the Pentagon said Monday.

"In 2012, numerous computer systems around the world, including those owned by the U.S. government, continued to be targeted for intrusions, some of which appear to be attributable directly to the Chinese government and military," the report said.

In March, the Obama administration demanded that China end its "unprecedented" campaign of cyberespionage, warning that the hacking activity threatens to derail efforts to build stronger ties between the two countries.