It's not just about the law enforcement.
The rioting this week in Baltimore has been blamed on anger and frustration over the April 19 death of a 25-year-old African-American man in police custody.
But the source of the widespread unrest in the city—and other distressed urban neighborhoods—stems largely from decades of economic decline and the dearth of services and opportunities for those left behind, according to some economists, urban policy experts and local observers.
After a night of rioting and arson, residents of the hardest-hit neighborhoods in Baltimore began clearing debris Tuesday morning as National Guard members joined local police in sections of the city that had seen the worst of the protests.
Protesters continued to seek a fuller explanation for what happened to Freddie Gray, who died from a spinal injury a week after being arrested by Baltimore police, while city and state officials sought to maintain calm after violence flared after a week of peaceful protests. The public outcry echoed similar protests of police killings of unarmed black men in Ferguson, Missouri, and New York City.
As the violence subsided, some of that outcry turned to the economic forces that have thwarted efforts to widen opportunities for city residents. In neighborhoods hit hardest by Monday's rioting, more than a third of families live in poverty. Some sections have not been rebuilt since the 1968 rioting that followed the assassination of civil rights leader Martin Luther King Jr.