France, April 21 -- Sall, along with Chile's Michelle Bachelet, Argentina's Rafael Grossi, and Costa Rica's Rebeca Grynspan are to face questions from by 193 member states and NGOs for three hours on Tuesday and Wednesday.

The public Q&A format was created in 2016 to boost transparency, though the five permanent members of the Security Council - the United States, China, Russia, the United Kingdom and France - still hold veto power over who becomes the next secretary-general.

All four candidates to take over when Antonio Guterres steps down  on 31 December have pledged to grow trust in the divided organisation.

US President Donald Trump's envoy to the UN, Mike Waltz, has recently warned that...