evidence: etymology: the name derives from Djouba, another name for the Bari people of South Sudan [...] Diplomatic representation from the US chief of mission: Ambassador Michael J. ADLER embassy: Kololo Road adjacent to the EU's compound, Juba mailing address: 4420 Juba Place, Washington DC 20521-4420 telephone: [211] 912-105-188 email address and website: [...] South Sudan-Sudan: present boundary represents 1 January 1956 alignment, which clearly placed the Kafia Kingi area (adjacent to Central African Republic) within South Sudan as shown on US maps although it is mostly occupied by Sudan; final alignment pending negotiations and demarcation; the final sovereignty status of Abyei Area pending negotiations between South Sudan and Sudan; clashes continue in the oil-rich Abyei region; the United Nations interim security Force for Abyei (UNISFA) has been deployed since 2011, when South Sudan became independent, Sudan accuses South Sudan of supporting Sudanese rebel groups