Will US nuke upgrade to trigger new arms race?

Plans to upgrade the estimated 180 American tactical nuclear weapons in western Europe are expensive, dangerous and possibly trigger a dangerous reaction from Russia. The American government will be replacing these "relics of the Cold War" with precision guidance systems at a cost of $4 billion, in spite of swinging defense spending cuts. Russia has shown that it is acutely aware of NATO's plans. The country's military chief of staff said in early May that Russia could launch preemptive strikes against future NATO missile defense facilities in Europe if sufficiently threatened.
Whats going to happen now World War 3? if so were all dead.