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Warring parties of the Syria conflict have different narratives as to what happened during this week's suspected chemical weapons attack in northern Syria. More than 80 people are believed to have been killed. We discuss the various claims and how these effect the military and diplomatic dimensions to the war.
Also in the programme, Myanmar's leader, and Nobel Peace Prize winner, Aang San Suu Kyi talks to the BBC about allegations of ethnic cleansing of the country's Muslim Rohingya population; and could the horse tranquiliser turned party drug Ketamin be used as a medical anti-depressant?
(Picture: A Syrian man collects samples from the site of a suspected toxic gas attack in Khan Sheikhun, in Syria's Idlib province. Credit: Omar Haj Kadour/AFP/Getty Images)
Security Council members disagree over a likely chemical attack in Syria; we hear from an advisor to former President Obama. Also in the programme: former Breitbart chief Steve Bannon leaves Trump security committee, and British journalist Phil Cox recalls being kidnapped in Sudan.
(Photo: US Ambassador to the UN Nikki Haley holds up photos of Syria chemical victims at UNSC meeting in New York on 5 April 2017. Credit: Drew Angerer/Getty Images)
European leaders discuss options after a chemical attack in the Syrian province of Idlib left dozens of civilians dead and wounded. Also in the programme: Russia considers banning Jehovah's Witnesses; and what do Palm Beach's residents think about President Trump's Mar-a-Lago resort?
(Photograph shows supporting the future of Syria conference in Brussels. Credit: European Photopress Agency)
At least 58 people were killed in the apparent chemical attack on Khan Sheikhoun in north-west Syria. The White House says it's "confident" the government of Bashar al-Assad was behind it.
Also in today's programme, the graphene-based sieve capable of removing salt from seawater. And fresh attempts to locate Caligula's pleasure boat.
(Photo: A Syrian child is treated in hospital after the apparent chemical attack. Credit: Mohamed al-Bakour / AFP / Getty Images)
Photos and videos on social media appear to show civilians, many of them children, suffering from the effects of poison gas in a rebel-held town in northern Syria. The Syrian government denies possessing chemical weapons.
Also on the programme: Newshour is in Nebraska to ask whether President Trump can bring jobs back to the state. And Russian authorities name their prime suspect for the bomb attack on the St Petersburg metro.
(Photo: A Syrian man is taken to hospital following a suspected toxic gas attack in a rebel-held town in Idlib province. Credit: Mohamed Al-Bakour/AFP/Getty Images)
Authorities in the Russian city of St Petersburg say ten people have been killed in an explosion on the metro system that's being treated as a suspected terrorist attack. We hear from an eyewitness, a journalist at the scene and a security analyst.
Also on the programme: The Mexican newspaper that shut down after one of its reporters was shot dead. And is there a link between Marine Le Pen and the Kremlin?
(Image: The damaged train carriage at Technological Institute metro station in St Petersburg. Credit: AFP/Getty Images)