PIUSA, Estonia — As part of a large-scale security and modernization campaign sparked by the invasion of Ukraine, the Estonian government is moving to set up and deploy a “drone wall” across its entire eastern border with Russia by the end of 2027. This massive, in-the-works fortification will include a combination of surveillance assets, multilayer sensors, countermeasure platforms, and uncrewed systems that can take out hostile enemy drones across the roughly 183-mile border, which also marks a major boundary shared between Russia and the NATO alliance. Members of Estonia’s Police and Border Guard Board briefed DefenseScoop and others participating in...