African union in ethiopia
Obama confident Africa is 'marching towards justice and equality'
Concluding his two-nation visit to Africa, Obama pledged US support for the continent.
Concerns over health institutions, education and traditional burial rites were raised.
Armed groups such as Boko Haram and al-Shabaab are seen as a menace to the continent.
President Jacob Zuma made an impassioned call for restoring law and order and social services after conflict.
The office is a first in Africa and aims to develop a global astronomy education network.
An African Union summit called on the UN Security Council to defer the trial.