The first damage assessment of a sprawling cyberattack linked to Russia has been chilling enough.
With intrusions reported across a huge swath of the government – including at the Department of Energy's National Nuclear Security Administration – federal officials already are signaling that the worst may be yet to come.
The Department of Homeland Security's cybersecurity unit has acknowledged that the full scope of the attack is not yet known, with an untold number of local government and private sector systems at "grave risk."
Secretary of State Mike Pompeo said U.S. officials are "still unpacking" the cyber intrusion but he publicly blamed the Kremlin.