Bill Gertz of the Washington Free Beacon highlights the latest developments in cyber warfare against the United States.

Foreign nations’ cyber intrusions into key infrastructure network are preparation for damaging attacks in a future conflict, the commander of Cyber Command told Congress Tuesday.

Adm. Mike Rogers, the commander who is also director of the National Security Agency, said one of his major concerns is cyber attacks on critical infrastructures used to run the electric grid, financial systems, communications networks, the transportation systems, and others.

“We assess that several countries, including Iran, have conducted disruptions or remote intrusions into critical infrastructure systems in the United States,” Rogers said in his prepared statement.

Iranian hackers were linked to cyber disruptions of U.S. financial institutions last year, and Russian-linked BlackEnergy malware was used in cyber attacks against Ukraine’s electrical power systems.

Homeland Security also has warned U.S. critical infrastructure administrators to be alert for the use of BlackEnergy cyber attacks here.