PBS Newshour: Will M23 step-down set the stage for peace among armed groups in the Congo?

The M-23 rebel group announced Tuesday it is putting down its arms after 20 months of insurgency against the government in the Democratic Republic of the Congo. For more on what this means for the future of the Congo and the other armed groups there, Gwen Ifill talks to Jon Sawyer of the Pulitzer Center on Crisis Reporting.