The 80th General Assembly of the UN is meeting in New York. How does it work - and why?

World leaders will gather in New York next week for the annual General Assembly. Secretary-General Antonio Guterres has highlighted peace, climate, responsible innovation, gender equality, development financing and UN reform as central themes of the week. But the high-level week of the General Assembly also marks the 80th anniversary of the founding of the United Nations. We take a look at just what the UNGA is and what its powers are.