Hackers that breached US government databases stole the personal information of at least 21.5 million people, officials said on Thursday.
The breach prompted a series of hearings in Congress and widespread criticism of the state of US cyber defences, provoking an investigation into better system hardening and breach detection.
Those affected include government job applicants, federal contractors, and over a million of their partners, the Office of Personnel Management said.
The stolen data also includes health and financial information, criminal records, and the names and addresses of government employees and their relatives.
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