Attendees walk past an electronic display showing recent cyberattacks in China at the China Internet Security Conference in Beijing, on Sept. 12, 2017. Hackers linked to China were likely behind the exploitation of a software security hole in cybersecurity firm Barracuda Networks’ email security feature that affected public and private organizations globally, according to an investigation by security firm Mandiant. (AP Photo/Mark Schiefelbein) **FILE**
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