The Assistant Secretary of Defense for Asian and Pacific Security Affairs, or ASD (APSA) is the principal advisor to the Under Secretary of Defense for Policy (USD(P)) and the Secretary of Defense on international security strategy and policy on issues of DoD interest that relate to the governments and defense establishments of the nations and international organizations within the Asia-Pacific region. Like the Assistant Secretary of Defense for International Security Affairs, the ASD (APSA) is responsible for oversight of security cooperation programs and foreign military sales programs within the regions under its supervision. The ASD (APSA) also works closely with the United States Pacific Command, United States Central Command, and the Asia-Pacific Center for Security Studies. Finally,