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British police have released details of the man behind Wednesday's attack. Eight people have also been arrested.
Also in the programme: US Congress postpones vote on Obamacare replacement; Israeli man arrested over threats to Jewish cultural centres in the US.
(Photo: Members of the public light candles during a candlelit vigil at Trafalgar Square on March 23, 2017. Credit:Carl Court/Getty Images)
The British Prime Minister, Theresa May, says the man who carried out an attack on Westminster was known to security forces. Eight people have been arrested following the killing of three people on Wednesday outside the Houses of Parliament.
Also in the programme: Thousands attend the funeral of former IRA commander turned First Minister of Northern Ireland, Martin McGuinness, in Londonderry. And the Taliban take control of Sangin.
(Photo: Armed police officers near the Houses of Parliament in central London. Credit: AFP /Getty Images)
The latest eyewitness reports and analysis from London where several people have been killed and injured outside the Houses of Parliament.
Also: the US State Department hosts more than 70 countries for a meeting on defeating the Islamic State group. And Syria's national football team is dreaming of World Cup qualification.
(Photo: A police officer stands guard near Westminster Bridge and the Houses of Parliament in London. Credit: Jack Taylor/Getty Images)
A police officer has been stabbed in the Houses of Parliament in central London, in what police are treating as a terrorist incident. There are also reports of as many as five people being "mowed down" on nearby Westminster Bridge. (Photo: An armed police officer guards inside a police cordon outside the Houses of Parliament in central London on March 22, 2017 during an emergency incident. Credit: Daniel Leal-Olivas/AFP/Getty Images)
Former US senator, George Mitchell, recalls negotiating peace with Martin McGuinness. The former IRA commander died in Northern Ireland on Tuesday. Speaking to Newshour, a woman who lost her sister to an IRA bomb said Martin McGuinness failed to reach out to families who lost their loved ones in IRA attacks.
Also on the programme: UK joins US in limiting large electronic devices from certain airline flights, and a new puppet in Sesame Street.
(Picture shows Emmett and Fiachra McGuinness carry the coffin of their father Martin through Londonderry, Northern Ireland. Credit: AP Photo/Peter Morrison)
From senior commander in the Irish Republican Army to key peacemaker and politician: Martin McGuinness has died.
Also on the programme: The BBC's Steve Rosenberg travels to the Crimean capital Simferopol to gauge the mood, after three years under Moscow's rule.
And the US bans passengers flying from specific airports in the Middle East and North Africa from carrying laptops in the cabin of US-bound flights.
(Photo: Martin McGuinness in 2015 at Stormont Castle in Belfast, Northern Ireland. Credit: Getty Images)