Owing to current affairs, I feel compelled to opine on the issue of North Korea's testing of nuclear bombs, or hydrogen bombs. Since I am unconcerned with which category of weapons North Korea tested, let us operate under the assumption that it was the earlier.

North Korea conducted a missile test off its east coast on Friday morning, but the launch appears to have failed, say US and South Korean officials.

China says it is restricting trade with North Korea, announcing bans on gold and some coal imports and jet fuel exports, in line with UN sanctions.