Since the Office of Personnel Management's first announcement on June 4, 2015 that the personal information of millions of current and former federal employees ...
OPM announced that 21.5 million people were affected by the cyber breach of its background investigation databases. DHS said the timeframe when the offenders breached the system was May 2014 to April 2015. During that span, though, the hackers were only active between June 2014 and January 2015.