Facebook Chief Grilled by US Congress

The founder and CEO of Facebook, Mark Zuckerberg, has been questioned by senators over the misuse of personal data.

Also in the programme: the twentieth anniversary of the Good Friday agreement that ended decades of violence in Northern Ireland.

Picture: Facebook CEO Mark Zuckerberg arrives to testify before a joint hearing of the US Senate Commerce, Science and Transportation Committee and Senate Judiciary Committee on Capitol Hill. Credit: AFP/Getty Images.