By Lukman Abdulmalik, The Whistler By day, the city’s main arteries hum with commerce and prayer. By night, another economy comes alive, quiet, nimble, and dangerous. At about 8 p.m. on Tuesday night, on a busy roadside of Sabon Titi, Kumbotso LGA, a young man (Abdullahi Sadiq), in a faded hoodie, pauses beside a parked