The election of the first black US president offered hope to millions of African Americans across the country. But have four years of an Obama presidency seen positive change for black communities in the US’ inner cities? Fault Lines’ Sebastian Walker spends time with those on the front lines of the failed drug war to understand some fundamental dynamics of race, poverty, incarceration and economic truths in the US in an election year."Don't ever think it's a war on drugs. It's a war on the blacks. It started as a war on the blacks and it's now spread to Hispanics and poor whites… it was designed to take that energy coming out of the civil rights movement and destroy it," says Ed Burns, co creator of The Wire, who is interviewed in the program.