Seventy countries urged North Korea on Friday to scrap its nuclear weapons, ballistic missiles and related programs, decrying the “undiminished threat” posed to world peace. Signatories included the United States and South Korea, as well as nations in Asia, Latin America, Africa and Europe. Russia and China, supporters of Pyongyang, did not sign the document drafted by France. With two missile launches in a week, Pyongyang is walking a fine line between increasing pressure on the US and not derailing nuclear negotiations — all while giving itself room to escalate, analysts say. According to a diplomatic source, about 15 countries asked to sign on to the request for North Korean disarmament after the new missile firings. The signatories “strongly deplore the grave and undiminished threat to regional and international peace and security posed by the ongoing nuclear weapons and ballistic missiles programmes that the Democratic People’s Republic of Korea (DPRK) has develope...