It was the middle of the day when Omar Diaw, known by his artist name “Chimere” — French for chimera — approached a blank wall off the main thoroughfare in Guinea 's capital and started spray-painting.
“They know who I am,” he said confidently. Though it wasn’t clear who ”they” were, civilians and police didn’t bat an eye as Diaw's fellow artists unloaded dozens of paint cans onto the roadside in Conakry.
