U.S. officials today attributed the Microsoft Exchange hack to Chinese entities as part of a coordinated effort by the Justice and State departments, Cybersecurity and Infrastructure Security Agency, intelligence agencies and international allies to detail how Chinese state-backed actors were able to infiltrate U.S. networks over the past few years and begin imposing consequences. The U.S. has completed an international investigation into China's Ministry of State Security, and worked with allies in the "European Union, the United Kingdom, Australia, Canada,...