I think it'd be easy if you could spend around 15 years (or less if you have plenty of rockets lying around): Just tow a few dozen asteroids into orbit and thre

I think it'd be easy if you could spend around 15 years (or less if you have plenty of rockets lying around): Just tow a few dozen asteroids into orbit and threaten to drop them on San Francisco or DC if the US does not bow down. The best that could happen is that they're nuked during descent causing the whole country to be covered in fallout asteroid dust.