(FILES) In this file photo taken on March 25, 2015, US special envoy to South Sudan Donald Booth speak to the press in Juba. The US State Department nominated experienced Africa hand Donald Booth as a special envoy to Sudan, on June 12, 2019, hoping he can help craft a "peaceful political solution" between the military rulers and groups seeking civilian rule. / AFP / SAMIR BOL
US special envoy to Sudan Donald Booth. AFP

US appoints veteran diplomat as special envoy to Sudan