Buried far below the mass media coverage of the U.S.-North Korea summit spectacle, Donald Trump -- assisted by his military and civilian advisors -- is busy getting the United States ready for nuclear war.  A massive nuclear weapons buildup now underway (at a potential cost of $2 trillion), new nuclear policy guidelines widening the scope for the use of nuclear weapons, and a high level of mental instability, impulsiveness, and vindictiveness on the part of the U.S. commander-in-chief combine to create a giant step toward catastrophe.