Another bombshell

THE declaration on January 6th that North Korea had detonated its first hydrogen bomb was met with a show of joy on the streets of Pyongyang, its capital, and with despair in most others. America, Japan, South Korea and even China protested. Outsiders picked up the magnitude-5 earthquake caused by the blast, and put its epicentre at Punggye-ri, site of an underground complex in the north-east, near China, where three previous tests, in 2006, 2009 and 2013, took place.