This essentially took the form of a hackathon, involving teams from all over the USSR and allied nations, creating the most diverse range of robots that 1980s Soviet technology and later Western technology could muster. Many of these robots didn’t perform very well, or at all, mostly due to the bypassing of any kind of testing before deployment. Eventually manual measurements proved to be faster and safer. Early debris removal robots like the TR-1A were rather simplistic, with successive generations of robots over the next weeks and months improving on it. Eventually bulldozer designs like the STR-1 helped to push radioactive debris off the roofs into containers, massively reducing the radioactive contamination of the area.