Poland, Estonia, Latvia, and Lithuania called on the European Union to build a line of defense along the bloc’s border with Russia and Belarus to protect the EU from military threats and other harmful actions from Moscow. The leaders of the four countries, which each share a border with either Russia or Belarus, drafted a letter to the EU President detailing the scale and cost of the project. EU countries would be required to commit political and financial support. “The creation of a system of defense infrastructure along the external border of the EU with Russia and Belarus will meet the acut…