TechnologyMeet the amateur drone pilots defending Ukraine’s border with Russia As tensions rise in Ukraine with Russian troops arriving at the border in increasing numbers, a small army of amateur engineers is monitoring events using homemade drones equipped with sensors and old Soviet missiles News
TechnologyUS army to 3D print concrete buildings and bridges in disaster areas The US Army Corps of Engineers has developed technology that can 3D print buildings in disaster areas, and there are plans for the world’s first 3D-printed vehicle bridge News