The Soviet Union supplied North Korea with FROG surface-to-surface missiles around 1969. This is how the US figured it out.

Note to readers: One of the many challenges we face in trying to reduce nuclear dangers is how to engage China, India, and Pakistan into a diplomatic process, multilateral and bilateral, that strengthens and lengthens two of the norms we live by: no battlefield use and no testing of nuclear weapons. To learn more, check …

Quote of the week: “Success is where preparation and opportunity meet.” — Bobby Unser When it comes to arms control, presidents are hamstrung or empowered by historical context. It also helps to be a Republican because Republican presidents have far more leeway than Democrats when it comes to the pursuit of arms control. The more …