President Obama's Attack on Donald Trump

President Obama says Donald Trump is "unfit" to be president and he's questioned why the Republican party continues to support Mr Trump's candidacy.

Fancy jumping from a plane, 7.6km high in the air, without a parachute? We'll speak to the man who has, Luke Aikins.

The UN is warning that South Sudan is facing a humanitarian catastrophe. We'll ask how, and if, this can be averted.