![The Treaty on the Prohibition of Nuclear Weapons has come into force - a decades-long campaign aimed at preventing a repetition of the US atomic bombings of Hiroshima and Nagasaki [File: Peter Parks/AFP]](/wp-content/uploads/2021/01/000_YS9AY.jpg?resize=570%2C380)
The Treaty on the Prohibition of Nuclear Weapons is now international law, but top powers refuse to join the accord.
Nuclear Weapons
![In this August 9, 1945 file photo, a mushroom cloud rises moments after the atomic bomb was dropped on Nagasaki, southern Japan. On two days in August 1945, US planes dropped two atomic bombs, one on Hiroshima, one on Nagasaki, the first and only time nuclear weapons have been used [File: AP Photo]](/wp-content/uploads/2015/08/2675c3d4bc1d4789bd4b63186d778dd5_18.jpeg?resize=570%2C380)
More than 75 years after Hiroshima and Nagasaki, the world’s first agreement banning nuclear weapons enters into force.
![Psaki noted that the treaty was 'an anchor of strategic stability' between our two countries [File: Thomas Kronsteiner/Getty Images]](/wp-content/uploads/2020/07/65e9eb75b16245c08b9d4db782ac8dc8_18.jpeg?resize=570%2C380)
The New START treaty is the last remaining deal limiting US-Russia nuclear weapons as Trump withdrew...
![Pakistan is one of eight nations worldwide with stated nuclear weapon capability [File: HO/ISPR/AFP]](/wp-content/uploads/2021/01/000_Del8389935.jpg?resize=570%2C380)
Pakistan’s military did not say whether the test-fired Shaheen III missile was capable of carrying...
![Rouhani on Wednesday celebrated the end of Trump’s 'malevolent rule' [File: Alexei Druzhinin/Reuters]](/wp-content/uploads/2021/01/2021-01-20T073817Z_152584837_RC2JBL9AW0RR_RTRMADP_3_IRAN-NUCLEAR-USA.jpg?resize=270%2C180)
Opposing messages by Iran and the new US administration promise tough road ahead for the nuclear deal Trump abandoned.
![Antony Blinken testifies during his confirmation hearing to be secretary of state before the Senate Foreign Relations Committee on Capitol Hill in Washington, DC, January 19, 2021 [Graeme Jennings/Pool via AP]](/wp-content/uploads/2021/01/AP_21019738758554.jpg?resize=270%2C180)
Joe Biden’s cabinet nominee says policy review is aimed at reviving stalled talks over N Korea’s nuclear programme.
![France, Germany and Britain say Iran’s plans to produce uranium metal has 'potentially grave military implications' [File: Reuters]](/wp-content/uploads/2021/01/2005-08-07T110000Z_7799741_PBEAHUNYAGG_RTRMADP_3_IRAN.jpg?resize=270%2C180)
Iran says it is advancing research on uranium metal production with the aim of feeding a research reactor in Tehran.
![North Korean leader Kim Jong Un acknowledges the applause during the 8th Congress of the Workers' Party in Pyongyang. Kim pledged to develop the country's nuclear weapons, but also acknowledged severe economic problems [KCNA via Reuters]](/wp-content/uploads/2021/01/2021-01-12T230258Z_1102099096_RC2N6L9EQQWE_RTRMADP_3_NORTHKOREA-POLITICS.jpg?resize=270%2C180)
At party Congress, Kim pledges to expand weapons programmes with the aim of ‘making a preemptive nuclear strike’.
![Iran has recently been enriching uranium up to 4.5 percent [File: Leonhard Foeger/Reuters]](/wp-content/uploads/2019/05/63a34ce25368479e8e2ab22e7b030fc3_18.jpeg?resize=270%2C180)
IAEA says Iran informed the agency of the move that will take place at the Fordow plant.
![EU foreign policy chief Josep Borrell says the meeting's aim was to 're-emphasise our commitment to preserve' JCPOA [File: Francois Lenoir/Reuters]](/wp-content/uploads/2020/12/2020-01-10T184228Z_855887908_RC26DE9286UP_RTRMADP_3_IRAN-NUCLEAR-EUROPE.jpg?resize=270%2C180)
Remaining parties to landmark 2015 deal reaffirm commitment as Iran’s nuclear programme’s chief slams a Parliament bill.
![US president-elect Joe Biden and Europe have signalled that while they wish to restore the nuclear deal, they believe it needs to be renegotiated and extended [Iranian Presidency Office via AP]](/wp-content/uploads/2020/12/AP_20344346011007.jpg?resize=270%2C180)
President Rouhani says Iran will return to its commitments that were part of the deal if other signatories do the same.
![A handout picture provided by Iran's Defence Ministry on November 30, 2020, shows the coffin of slain top nuclear scientist Mohsen Fakhrizadeh in front of a large display depicting him next to Iran's Supreme Leader Ayatollah Ali Khamenei during the funeral ceremony in Tehran [File: Iranian Defence Ministry/AFP]](/wp-content/uploads/2020/12/000_8W73RU.jpg?resize=270%2C180)
We’re exploring Mohsen Fakhrizadeh’s story and the future of US-Iran relations.
![In this March 28, 2018 photo, released by China's Xinhua News Agency, North Korean leader Kim Jong Un, left, and Chinese President Xi Jinping pose for a photo in Beijing [File: Ju Peng/Xinhua via AP]](/wp-content/uploads/2019/01/9ecc14636ba2439498b7856e28cc364a_18.jpeg?resize=270%2C180)
The US alleges China is ‘seeking to undo’ United Nations sanctions aimed at curbing North Korea’s nuclear programme.
Al Jazeera’s Assed Baig explains what’s next for Iran after the assassination of nuclear scientist Mohsen Fakhrizadeh.