As Kyiv braces for a Russian attack, 'hedgehogs' face off against tanks.

A muddy building site in a nearby neighborhood was swarming with employees and welders of the KAN real estate developer as Russian troops drew in on Ukraine's capital Kyiv on Thursday (Mar 3).
Instead of houses and buildings, they built "hedgehogs," massive metal anti-tank barriers, and smaller spiked obstacles to halt wheeled vehicles.