Pakistan's Ambassador to the United States Masood Khan called on US Congressman Jack Bergman.Jack Bergman is serving in the House Committee on Veterans' Affairs, the House Armed Services Committee, and the House Budget Committee.They held a productive discussion on further strengthening Pak-US cooperation in the areas of defence and security, trade and investment, education, parliamentary exchanges and diaspora linkages.Ambassador Masood Khan and Congressman Jack Bergman also exchanged views on global and regional security.Source: Radio Pakistan