They glided out of the heat-haze on their camels like specters. There were twenty of them, and they were Tuareg. Their faces were hidden by black veils that left only slits for the eyes, and they wore purple robes that fluttered in the desert wind. They carried swords, muskets and seven-foot iron spears, and wore stilettos in sheaths on their left forearms. They were an impressive, sinister sight.