Afghanistan and the Struggle to Walk Away Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email Sgt. Richard A. Darvial and Spc. Corey C. Canterbury fire a mortar in eastern Afghanistan Dec. 11. ( Staff Sgt. Mark Burrell, U.S. Army ) Produced by Kristen Meinzer Produced by PRI and WNYC