The Alarming Spread of Leaked Pentagon Documents.

Pentagon officials are alarmed by the leak of highly classified military plans on the war in Ukraine that surfaced last week, containing information so sensitive that only people with the highest levels of security clearance in the U.S. government can access them. The Justice Department has opened a criminal investigation into the breach, and the Pentagon is leading an interagency effort to determine the impact on national security. The breach raises new questions about what steps the U.S. government is taking to protect sensitive information and particularly the implications for Ukraine’s fight against Russia.