Creator of the Zircon hypersonic missile, Alexander Leonov, has died
The General Designer of NPO Mashinostroyeniya was 74 years old
UR-100N UTTH
Missiles More Than 40 Years Old: The Service Life of UR-100N Nuclear ICBMs with Avangard Will Be Extended
Specialists disassemble the missiles annually and check their condition
Russia extends the service life of 1976 intercontinental ballistic missiles
UR-100N UTTKh ICBMs have been in service for 49 years