Turning Up the Heat

Pascale Harter introduces stories of smouldering conflict from reporters around the world. Kevin Connolly explores Russia's role in the Syrian civil war, and traces its historical sources; Katarina Vitozzi meets a man providing refuge for families fleeing Boko Haram in northern Nigeria; Sanjoy Majumder examines the social faultlines laid bare by blockade and dispute over Nepal's new constitution; and Bridget Kendall asks whether Ukraine can manage the ex-volunteer fighters who've been hardened by time on its frontlines.

Photo: Civilians gather at a makeshift camp for displaced people on the outskirts of Maiduguri on March 25, 2015. (Nichole Sobecki/AFP/Getty Images)