The White House scrambled to get a message to President Vladimir V. Putin of Russia last year after U.S. intelligence agencies said a Russian military unit was preparing to send explosive packages on ...

By David E. Sanger The barrage appeared to be one of the largest recent assaults in Ukraine’s campaign to damage Russia’s war machine on its home territory. By Cassandra Vinograd Ukrainian ...

David E. Sanger is a national security correspondent and senior writer for the New York Times, a contributor to CNN and an adjunct lecturer at the Kennedy School of Government. In a 38-year ...