Love/Hate actor and activist is back for another documentary series tonight, and this time he's in America exploring the complex issue of race relations. He begins by examining the discrimination, poverty and violence faced by African-American communities. John asks why young black men are nine times more likely to be killed by the police than those from other backgrounds and delves into the reasons behind the Black Lives Matter movement, which began in 2012 when a neighbourhood watchman was acquitted after he shot and killed unarmed black teenager Trayvon Martin.