Possible Clues:

• Doctors Without Borders, e.g., briefly
• CARE International, e.g.: Abbr
• Oxfam, e.g.: Abbr
• International aid grp
• South Vietnam's first president ___ Dinh Diem
• Public body that's not part of the government structure
• Intl. group
• International Red Cross, e.g.: Abbr.
• ___ Dinh Diem of Vietnam
• Gp. interested in sustainable development, perhaps