TY - GEN AU - COPLEY Gregory R. TI - Nuclear weapons 2.0: the twilight world tour? KW - NUCLEAR WEAPONS KW - NUCLEAR PROLIFERATION KW - HYPERSONIC WEAPONS N2 - Nuclear proliferation has occurred and this has rendered the original tenets of nuclear deterrence silenced, while the evolution of new weapons and countermeasures is far more significant in pushing nuclear weapons toward meaninglessness. This article looks at the evolution and how its lines are blurred ER -