Nuclear proliferation thumb|P5+1 and Iranian negotiators meeting in Geneva for the interim agreement on the Iranian nuclear programme (2013) On 8 April 2010, the United States and Russia signed a treaty in Prague, Czech Republic agreed to reduce the stockpiles of their nuclear weapons by half. It is meant to replace the Strategic Offensive Reductions Treaty (SORT), which was set to expire. The treaty went into force on 5 February 2011 after it was ratified by both nations. In 2015, Iran and other world powers agreed to trade sanctions relief for explicit constraints on Iran's contentious nuclear program, including allowing the inspections of nuclear facilities by the International Atomic Energy Agency (IAEA). On 16 January 2016 the IAEA confirmed that Iran had complied with the agreement (the JCPOA), allowing the United Nations to lift sanctions immediately. However, on 8 May 2018, United States President Donald Trump announced the United States was withdrawing from the deal.Trump, Iran and the end of the deal , The Spectator. On 7 July 2017, the United Nations passed the Treaty on the Prohibition of Nuclear Weapons, the first legally binding international agreement to comprehensively prohibit nuclear weapons, with the goal of leading towards their total elimination. It has been signed by 58 nations. Throughout the decade, North Korea expanded its nuclear capabilities, performing alleged nuclear tests in 2013 and 2016, which governments responded by placing international sanctions on the country. In response North Korea has threatened the United States, South Korea and Japan with pre-emptive nuclear strikes. However, in 2018, North Korea suggested that they may disarm their nuclear arsenal after negotiations with the United States. On 1 February 2019, The US formally suspended the Russo-American Intermediate-Range Nuclear Forces Treaty (INF), and Russia did the same on the following day in response. The US formally withdrew from the treaty on 2 August 2019. The United States initiated a renovation of its nuclear weapon arsenal.
Nuclear proliferation thumb|P5+1 and Iranian negotiators meeting in Geneva for the interim agreement on the Iranian nuclear programme (2013) On 8 April 2010, the United States and Russia signed a treaty in Prague, Czech Republic agreed to reduce the stockpiles of their nuclear weapons by half. It is meant to replace the Strategic Offensive Reductions Treaty (SORT), which was set to expire. The treaty went into force on 5 February 2011 after it was ratified by both nations. In 2015, Iran and other world powers agreed to trade sanctions relief for explicit constraints ,on Iran's contentious nuclear program, including allowing the inspections of nuclear facilities by the International Atomic Energy Agency (IAEA). On 16 January 2016 the IAEA confirmed that Iran had complied with the agreement (the JCPOA), allowing the United Nations to lift sanctions immediately. However, on 8 May 2018, United States President Donald Trump announced the United States was withdrawing from the deal.Trump, Iran and the end of the deal , The Spectator. On 7 July 2017, the United Nations passed the Treaty on the Prohibition of Nuclear Weapons, the first legally binding international agreement to comprehensively prohibit nuclear weapons with the goal of leading towards their total elimination. It has been signed by 58 nations. Throughout the decade, North Korea expanded its nuclear capabilities, performing alleged nuclear tests in 2013 and 2016, which governments responded by placing international sanctions on the country. In response North Korea has threatened the United States, South Korea and Japan with pre-emptive nuclear strikes. However, in 2018, North Korea suggested that they may disarm their nuclear arsenal after negotiations with the United States. On 1 February 2019, The US formally suspended the Russo-American Intermediate-Range Nuclear Forces Treaty (INF), and Russia did the same on the following day in response. The US formally withdrew from the treaty on 2 August 2019. The United States initiated a renovation of its nuclear weapon arsenal.