A Russian S-400 air defense missile system during a rehearsal for the Victory Day military parade in Moscow, May 3, 2018 (AP photo by Alexander Zemlianichenko). Such systems reduce NATO's ability to counter the Russian threat in Eastern Europe.

As NATO has focused its attention on Russia’s offensive military capabilities in Eastern Europe, an equally significant and, in practice, more problematic issue has been largely ignored: Russia’s preponderance of “anti-access, area-denial” capabilities in the borderlands between the Baltic and Black Seas. Is NATO focusing on the wrong Russian threat in Eastern Europe? This week, U.S. National Security Adviser John Bolton was in Moscow, where he met with Russian President Vladimir Putin to discuss, among other things, the U.S. withdrawal from the Intermediate-Range Nuclear Forces Treaty. Announced by President Donald Trump last weekend, the move comes after repeated Russian violations […]