Superstar urges action over Kenya refugees

One of Africa's most celebrated singer-songwriters has urged action for the continent's most pressing humanitarian tragedy. Senegalese star Youssou N'dour visited Dadaab refugee camp in Northeast Kenya, the world's largest refugee camp. At least 12 million affected by famine and drought in the region are desperate for help. Al Jazeera's Bhanu Bhatnagar reports.