As Mogadishu emerges from 20 years of war, a security vacuum has appeared in the Somali capital.<br /><br />Despite al-Shabab fighters withdrawing in August, government forces are struggling to make the city safe.<br /><br />Local communities are organising their own armed gangs to protect themselves, threatening to return the city to the worst days of its warlords.<br /><br />Al Jazeera's Peter Greste reports from Mogadishu.
