Today in Focus

Hoda Muthana, an American who joined Isis four years ago, now wants to return home. The Guardian’s Martin Chulov describes his time at al-Hawl refugee camp, where an estimated 1,500 foreign women and children are seeking safety. And: Polly Toynbee on the split within the Labour party

When the writer Peter Pomerantsev was a teenager, he was sent to a school that was part of the European Schools network, which counts Boris Johnson among its alumni. He discusses what the project can tell us about the EU. Plus: the Guardian’s UK technology editor, Alex Hern, on AI advancements

This Friday marks six years since Ella Kissi-Debrah’s death, which her mother believes was partly caused by air pollution. Plus: 15-year-old George Bond explains why he is going on today’s school climate strike

Desperate to reach Europe, people from Africa are travelling to Egypt and selling body parts to pay for their onward passage. Seán Columb has spent more than five years researching this subject. Plus: Ruth Maclean on Nigeria’s upcoming elections

Brexit has become a divisive issue for the Labour leader and his party. Heather Stewart charts Corbyn’s changing relationship with the EU. Plus: Lois Beckett looks at the March for our Lives movement, a year after the Parkland shootings

The Guardian’s Julian Borger recently spent a week at the Guantánamo Bay detention facility, attending the 33rd pre-trial hearing of five 9/11 suspects. He discusses why arguably the most important criminal trial in American history has still not begun. And: Damian Carrington on the catastrophic decline of insects

After a spike in deaths among homeless people in the affluent city of Oxford, Robert Booth went to investigate. In a growing community of rough sleepers, there is little support for people with mental health problems and addiction. Plus: Nosheen Iqbal on the ‘white fragility’ preventing a frank national discussion about racism

Unless an agreement can be reached in the coming weeks, Britain will crash out of the European Union without a deal. There have been stark warnings about the effects for the UK, but how badly would it hurt the EU? The Guardian’s Jennifer Rankin, Angelique Chrisafis and Kate Connolly dig into the detail. Plus Amelia Gentleman on the resumption of deportation flights to Jamaica after the Windrush scandal

The cystic fibrosis drug Orkambi could extend the lives of thousands of children – but it comes with a price tag of £105,000 per patient per year. The NHS says it cannot afford it. Health editor Sarah Boseley explores how the cost of a life-extending drug can be weighed next to a person’s life. Plus: Natalie Nougayrède on the conspiracy theories threatening European unity

The young children of an Islamic State fighter were abandoned in Syria after his death. But with the help of human rights lawyer Clive Stafford-Smith and reporter Joshua Surtees, the boys have been reunited with their mother. Also today: columnist Gary Younge on the storm over Liam Neeson’s race comments