Boko Haram has killed thousands of people during its five-year campaign to overthrow Nigeria’s multi-religious state. Sally Davies examines how the group’s tactics are evolving as it seeks to expand its stronghold beyond northern Nigeria.<br /><br />For more video content from the Financial Times, visit http://www.FT.com/video<br /><br />Subscribe to the Financial Times on YouTube; http://goo.gl/vUQx5k<br />Twitter https://twitter.com/ftvideo<br />Facebook https://www.facebook.com/financialtimes
