Hurricane Irma Wreaks Havoc in the Eastern Caribbean

Hurricane Irma sweeps through the Caribbean, devastating the islands in its path. We hear about the damage from the prime minister of Antigua and Barbuda, Gaston Browne.

Also in the programme: treating people with debilitating insomnia; and Facebook reveals a misleading online ad campaign it believes was backed by a pro-Kremlin group.

(Photo: Aftermath of Hurricane Irma on the Caribbean island of St Martin. Credit: Reuters)