Vandalised embassies and piles of burning tyres marked chaotic demonstrations in the Democratic Republic of the Congo’s capital Kinshasa to denounce the “inaction” of the international community over the conflict raging in Goma, the main city in the country’s east. On foot or motorcycles, hundreds of angry demonstrators responding on Tuesday to the “Paralyse the City” call of a youth collective gathered in the upscale district of Gombe...