Washington (AFP) – Russia’s invasion of Ukraine highlights the “acute threat” posed by Moscow, but China is the most consequential challenge for the United States, the Pentagon said Thursday. The dangers are both conventional — Moscow’s aggression toward its neighbors and Beijing’s efforts to gain control of Taiwan — and nuclear, with Russia possessing an extensive arsenal and China’s stocks of atomic weapons growing fast. US Defense Secretary Lloyd Austin highlighted the different challenges posed by China and Russia as he unveiled the unclassified versions of several military strategy docu…