Recent STEM Graduates, per capita in the countries listed...

China...........0.0033
India............0.0019
U.S..............0.0017
Russia.........0.0038

Now, here are the Defense Expenditures per country...in dollars...(2023)

China...........296B
India..............84B
U.S..............916B
Russia.........130B

I suspect we have enough STEM grads to defend the USA.