North Korea fires another ballistic missile off its east coast, according to South Korean officials. This occurred while world leaders are attending the annual Nuclear Security Summit in Washington, D.C., where North Korea is on the agenda for discussion. [https:--www.theguardian.com-world-2016-apr-01-north-korea-missile-leaders-us-nuclear-security ("The Guardian")] [http:--english.yonhapnews.co.kr-news-2016-04-01-0200000000AEN20160401006900315.html?input=www.tweeter.com (Yonhap)]date=August 2019