Stanislav Ivanovich Us, the chief designer of the R-36M ICBM and its modifications, including the RS-20 known as "Satan" by NATO, as well as the Dnepr converted rocket, passed away at the age of 90. This prominent figure in the Soviet missile program leaves behind a significant legacy in the field of strategic missile development. Us played a crucial role in the creation and evolution of these powerful ballistic missiles during the Cold War era. His contributions have had a lasting impact on the history of missile technology.