In this July 21, 2020 file photo, Department of Homeland Security Acting Secretary Chad Wolf, speaks during a news conference in Washington. In December, U.S. officials discovered that federal agencies had fallen victim to a cyberespionage effort pulled off largely through a hack of SolarWinds software .The hackers accessed accounts belonging to then-acting Secretary Chad Wolf and staff at the Cybersecurity and Infrastructure Security Agency who focus on finding cyber threats from nation-state adversaries like Russia, according to current and former senior Homeland Security Department and intelligence officials who were briefed on the extent of the breach. (AP Photo/Manuel Balce Ceneta, File)
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