A trailer has been released for the upcoming film “Half of a Yellow Sun,” and it is absolutely riveting. Based on the best-selling novel by Chimamanda Ngozi Adichie, the film tells an epic, heart-wrenching love story involving two twin sisters in newly independent 1960s Nigeria: “Preoccupied by their romantic entanglements, and a betrayal between the sisters, the events of their life loom larger than politics. However, they become caught up in the events of the Nigerian civil war, in which the lgbo people fought an impassioned struggle to establish Biafra an independent republic, ending in chilling violence which shocked the entire country and the world.”