Fears After US Sergeant Allegedly Kills 16 Afghans 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 An Afghan demonstrator adds flammable material to a burning police vehicle. ( Aref Karimi/AFP / Getty ) Produced by Mythili Rao and Joseph Capriglione Produced by PRI and WNYC