South Asia

All the world's nuclear-armed states (except for North Korea) have begun modernizing and upgrading their arsenals, leading many observers to predict that the world is entering a new nuclear arms race. While that outcome is not yet inevitable, it is likely, and if it happens, the new nuclear arms race will be different and more dangerous than the one we remember. More nuclear-armed countries in total, and three competing great powers rather than two, will make the competition more complex. Meanwhile, new non-nuclear weapon technologies — such as ballistic missile defense, anti-satellite weapons, and precision-strike missile technology — will make nuclear deterrence relationships that were once somewhat stable less so.

As President Donald Trump heads to his meeting with Chinese President Xi Jinping, he'll have the support of many other world leaders, former ambassador Nicholas Burns told CNBC on Thursday.

"One overlooked feature in this ongoing tragedy is that Trump isn't wrong about everything. Some of his critics won't admit it, but several of the themes he sounded during the 2016 campaign — such as the need to rebuild America's deteriorating infrastructure — were correct (if far from original), and some of his foreign-policy instincts were sound even if his command of details was not. A minimally competent president could have made substantial progress on most if not all of these fronts, thereby leaving the country better off and enhancing his prospects for a second term."

In this Project on Managing the Atom Discussion Paper, Philipp C. Bleek chronicles nuclear weapons proliferation choices throughout the nuclear age. Since the late 1930s and early 1940s, some thirty-one countries are known to have at least explored the possibility of establishing a nuclear weapons program. Seventeen of those countries launched weapons programs, and ten acquired deliverable nuclear weapons.