Chinese government hackers have hacked into the highly secretive Treasury Department office that imposes economic sanctions on countries and groups. This is one of the most powerful tools at the disposal of the United States to achieve national security goals,

The hacker attack on the US Treasury Department reportedly targeted the Office of Foreign Assets Control (OFAC), which administers sanctions for the US government.

A troubling series of breaches of U.S. firms and agencies could intensify friction between Washington and Beijing as Donald Trump takes office