[oneshtein]

Missiles were built by Ukraine.

[missedthecue]

Rocket engines, which were dual use with peacetime space exploration, I might add. They did not build warheads.

[oneshtein]

Warhead were built in closed cities, but research was done in institutes, mostly by Jews and Ukrainians. Kharkiv Institute of Physics and Technology was known as "Laboratory №1" for nuclear physics. Many nuclear physicists were trained there.