North Korea

http://edition.cnn.com/2016/01/06/asia/north-korea-hydrogen-bomb-test/

http://www.theguardian.com/world/2016/jan/06/north-korea-hydrogen-bomb-test-claim-met-with-increasing-scepticism

http://www.theguardian.com/world/2016/jan/06/sanctions-considered-after-condemnation-of-north-korea-nuclear-test

http://www.economist.com/news/leaders/21685451-after-pyongyangs-fourth-nuclear-test-china-must-change-its-tune-towards-its-outrageous

http://www.wsj.com/articles/u-s-analysis-indicates-north-korea-test-wasnt-hydrogen-bomb-1452106850