The crisis in Ukraine has taken on even more of a Cold War-era feel after a Russian warplane made nearly a dozen low passes over the weekend of a U.S. destroyer that was sailing in the Black Sea.
Col. Steve Warren, a Pentagon spokesman, calls the Russian flybys "provocative and unprofessional," NPR's Tom Bowman reports.
According to the Pentagon, the Russian SU-24 attack aircraft came within several thousand feet of the USS Donald Cook on Saturday and ignored multiple radio warnings from the ship.