JOHANNESBURG — The first Group of 20 summit to be held in Africa opens on Saturday with an ambitious agenda to make progress on solving some of the long-standing problems that have afflicted the world’s poorest nations.
Leaders and top government…

JOHANNESBURG — The first Group of 20 summit to be held in Africa opens on Saturday with an ambitious agenda to make progress on solving some of the long-standing problems that have afflicted the world’s poorest nations.
Leaders and top government…