Gun violence is down, but you wouldn't know it from the headlines. This progress didn't happen by accident—it's at least partially the result of smart, targeted strategies that address the root causes of violence. Professor Daniel Semenza explains what's working, drawing lessons from Camden's dramatic shift from "murder capital" to record-low homicide rates, and what we stand to lose as federal support for violence prevention is being rolled back.

For more on this topic:

• Read Semenza's op-ed in Common Dreams

• Check out a research paper he co-authored: In-person and media gun violence exposure in the United States