 The six-hour discussion focused on the release of Talibans from the Guantanamo Bay detention camp in exchange for the release of U.S. Army Sergeant Bowe Bergahl.In December 2010, he replaced Holbrooke as the acting special representative to Afghanistan and Pakistan.As the Bureau's second-ranking official, he served as Acting Assistant Secretary in the absence of the Assistant Secretary and manages directly the Directorate of Defense Trade Controls and the Office of Regional Security and Arms Transfers.