Russia again began to conduct tests of Soviet design – complex "Nudol". This is serious
November 15 during testing of the missile systemNudol was shot down by one of the inactive Soviet Tselina-D satellites. In response to this, the United States stated that such tests pose a danger to the ISS and other devices in orbit. But the important thing is that in fact these tests – far from the first in the world. Before this, two years ago, the Americans themselves tested their weapons. And then they were carried out by China and India.
Russia's goal now is – contributedevelopment of technologies to neutralize the technological breakthrough. This will not allow the United States to get ahead in the future: in five years, the Americans are going to place weapons in low-Earth orbit to destroy ground targets – X37B.

In addition, some time before the Tselina-D was shot down, Russia officially stated that testing the missile system did not pose any threat to the ISS.
According to military expert Dmitry Litovkin,this all happened due to the US withdrawal from the ABM Treaty (Treaty on the Limitation of Anti-Ballistic Missile Systems). This agreement contained a clause according to which the creation of mobile missile defense systems was prohibited. Also, according to Litovkin, Russia now has several similar missile systems: the S-500 and S-550. The first is designed to hit close targets, and the second – distant In America, work is underway on similar weapons, but significant results have not yet been achieved there. According to the expert, it is for this reason that the Pentagon is so scared that Nudol was able to shoot down a satellite.
Source: Life