The EU and NATO have a problem: three of their Baltic member states Estonia, Latvia and Lithuania have better rail connections with Russia than the rest of Europe. In the event of a military conflict with Moscow, this could become a critical chokepoint for troops. At a cost of $27 billion, the new 540 mile-long Rail Baltica aims to tackle NATO’s security fears head on. WSJ explores the new high speed rail line and the funding challenges and construction delays that risk derailing the critical