Last year, the director of the US Centers for Disease Control and Prevention presented research demonstrating that "youth living in inner cities show a higher prevalence of post-traumatic stress disorder than soldiers". The report estimates that 30% of young people in urban "combat zones" suffer from some form of PTSD.
When I mention this to Kendrick Lamar, he nods and says: "That's real." Recently, he was making the video for his new single, Alright, when he was startled by a loud bang. In a split second the successful 28-year-old rapper disappeared and the wary teenager from the streets of Compton, California resurfaced.