Nigeria's 500-year-old dying dye tradition

Residents of Kano in Nigeria are struggling to keep alive their centuries-old tradition of hand-dying delicate cloth a deep indigo blue, with their trade under threat from the realities of modern commerce.Kano's pits are said to date back 500 years and were once the center of a bustling Saharan trade in dyed cloth.There are still over 120 pits in Kano but only 30 of them are functioning. Many of them have been filled in, often because families have moved on to other businesses, but sometimes because they're waiting for their children to grown up, dig out the pit and reclaim their tradition.