The buses line up at the Invepi refugee camp in northern Uganda.
One after the other they drop off dozens of South Sudanese seeking refuge on this side of the border.
They come off carrying whatever possessions they still have: sometimes that means empty plastic jugs, sometimes it means chickens that provide food along the way. Many of the refugees are barefoot. When they've finished with their registration and vaccinations, some just sit there, staring into space.