Africa News Tonight: Tanzania opposition leaders, supporters detained, Sudanese refugees travel to Uganda, African athletes shine in Paris

Tanzania's main opposition group, Chadema, accused police of detaining the party’s former presidential candidate Tundu Lissu, other party leaders and more than 400 youth members. Tens of thousands of Sudanese refugees have crossed into Uganda this year after traveling through neighboring South Sudan. The Paris Olympics have wrapped up after some stellar performances by athletes from African nations.