Most films about Africa offer a stark picture of a war-torn continent. Mira Nair’s “Queen of Katwe” tells of the celebration of the human spirit through a young girl from a slum in Uganda turned chess champion.Based on a true story, the film boasts a stellar cast with Lupita Nyong'o and David Oyelowo and a vibrant cinematography. VOA’s Penelope Poulou has more.