摘要：I n his now-famous Prague speech in 2009 shortly after taking office, President Obama laid out his vision for a world without nuclear weapons.1 Although he had no timeline for reaching this goal, noting that it might not even occur in his lifetime, part of the pathway to that objective involved reducing the role of nuclear weapons in US national security strategy. The Nuclear Posture Review (NPR), released one year later, further defined and codified his vision for the security of the United States and its allies.2 Five years later, some of the implications of how this decision affects the US deterrent relationship with both Russia and China are becoming apparent.
