Sri Lanka's Easter Sunday bombings left at least 250 dead and more than 500 wounded. One week on we examine the history behind Sri Lanka's religious tensions and speak to a Catholic leader as churches across the country remain shut in fear of further attacks.

After so-called Islamic State claimed responsibility for the attack, we ask if this is now the terror group will operate now its territory has been defeated.

The Catholic Primate of All Ireland, Archbishop Eamon Martin, talks to Edward Stourton about the news that Northern Ireland's politicians have agreed to begin talks to try and restore the devolved government at Stormont after the journalist Lyra McKee was shot dead by the New IRA.

Producers: Harry Farley Carmel Lonergan

Editor: Amanda Hancox

Michael Gazzaniga - Free Yet Determined and Constrained (Lecture 4)