On 3 September Pyongyang conducted an underground nuclear test of a hydrogen bomb, and claimed it can now mount a thermonuclear weapon on a missile capable of striking the USA. The US Ambassador to the UN, Nikki Haley, said Kim was ‘begging for war’ and urged the Security Council to adopt the strongest sanctions measures possible to stop Pyongyang's nuclear programme. On 5 September President Vladimir Putin voiced the fears of many when he warned that the escalating crisis risks developing into a ‘global catastrophe’. While speaking to the leaders of Brazil, India, China and South Africa, Putin said that imposing further sanctions would be useless and ineffective, and that Kim would rather starve his people than see his regime overthrown. He also urged against ‘military hysteria’. At the time of writing South Korea’s PM said they expect the North to launch an intercontinental ballistic missile on 9 September.