

Sudanese President Omar Hassan al-Bashir (c.) arrives to inaugurate the new Sudan Gold Refinery in Khartoum September 19, 2012. The refinery is considered to be the biggest in Africa. Gold mining in Sudan went on a high gear after South Sudan gained independence starving Khartoum of urgently need foreign exchange through oil revenue. Mohamed Nureldin Abdallah/Reuters
Sudan's President Omar al-Bashir (l.) and South Sudan President Salva Kiir (r.) shake hands on the completion of a signing ceremony after the two countries reached a deal on economic and security agreements Sept. 27, 2012 in Addis Ababa, Ethiopia. Elias Asmare/AP
Workers show gold processes during Sudanese President Omar Hassan al-Bashir's (unseen) inauguration of the new Sudan Gold Refinery in Khartoum September 19, 2012. Mohamed Nureldin Abdallah/Reuters
Khadija Tia, 35, shortly after giving birth to her ninth child, at the International Rescue Committee's clinic in Yida camp, South Sudan Sept. 17, 2012. Yida refugee camp is home to thousands of people who have fled recent fighting in Sudan's Southern Kordofan state and around the border of Sudan and South Sudan. Mackenzie Knowles-Coursin/AP
Southern Sudanese people arrive in a barge at the port in Juba August 31, 2012. According to the International Organization for Migration (IOM), approximately 895 people arrived in the latest batch of people to return to the South, following the secession in July 2011 when the South Sudan became an independent state. Adriane Ohanesian/Reuters
Community leader Halima Harun Ismail inspects the damage at a clinic run by the NGO Goal in Kassab camp for Internally Displaced Persons (IDP) August 28, 2012. IDPs left the camp for Kutum town, North Darfur, several weeks ago after gunmen surrounded it, burnt down a police station and looted the main market. Albert Gonzalez Farran/UNAMID/Reuters
A woman sets up her shop at the Konyo Konyo market in Juba, South Sudan, May 12, 2012. The cost of everything from fuel to cooking oil has increased. Adriane Ohanesian/Reuters
Men wait in line with their jerry cans at a gas station in Juba, South Sudan, May 14, 2012. An oil shutdown since January by the former bush rebels, who now run the world's newest nation, has strangled the flow of dollars into an economy that produces almost nothing else. Adriane Ohanesian/Reuters
Refugees from South Kordofan, Sudan, gather around a small TV set in the Yida refugee camp in South Sudan on May 12, 2012. What little electricity exists in the camp comes from small generators and fuel is in short supply. More than 30,000 refugees currently reside in Yida, having fled war between the government of the Republic of Sudan and rebel forces in South Kordofan. Pete Muller/AP
A refugee child from South Sudan stands at a registration center in Kakuma, Kenya, May 18, 2012. Refugees fleeing violence in parts of Sudan and South Sudan have been arriving in the camp in large numbers. Aid agencies fear the camp's capacity could soon be exceeded. Thomas Mukoya/Reuters
Sudan People's Liberation Army (SPLA) soldiers attend celebrations to mark their 29th anniversary in South Sudan's capital Juba, May 16, 2012. South Sudan will soon acquire anti-aircraft missiles to defend its territory against air attacks it says are frequently carried out by warplanes from neighboring Sudan. Adriane Ohanesian/Reuters
Workers unload food for distribution at the Yida refugee camp in Unity State, South Sudan, on May 12, 2012. In recent weeks, aid agencies have reported a steep influx of new arrivals, at times exceeding 700 per day. Pete Muller/AP
Refugees await distribution of basic goods in the Yida refugee camp in South Sudan on May 12, 2012. Most arrive in need of food, medical treatment and other basic services. Pete Muller/AP
Sudanese military soldiers cheer and hold up their weapons during the visit of Sudanese President Omar al-Bashir (not seen) in Heglig April 23, 2012. Heglig was at the centre of the worst violence between Sudan and South Sudan since they split into two countries under a 2005 peace deal that ended decades of civil war. Seen in the background is the Sudanese flag. Mohamed Nureldin Abdallah/Reuters
Oil engineers work on pump stations before a ceremony in which oil operations at Heglig oilfield will resume on May 2, 2012. A conflict has erupted between Sudan and South Sudan regarding an oilfield located on the border of the two countries. Mohamed Nureldin Abdallah/Reuters
President Salva Kiir (c.) arrives at the John Garang Masoleum in Juba, Sudan, Friday, April 27, 2012, as he is welcomed back to the country by his supporters after an official visit to China. Michael Onyiego/AP
In this April 22, 2012 photo, fire billows up from an oil field that caught on fire in Heglig, Sudan. An official says Sudanese jets bombed three areas in South Sudan's Unity State, including a major oil field. South Sudan military spokesman Col. Philip Aguer said Antonov bombers accompanied by MiG 29 jets bombed the town of Abiemnom. Abd Raouf/AP
Deng Alor Kuol, the South Sudanese Minister of Foreign Affairs, gestures as he finishes talking to the media following the passing of a United Nations Security Council resolution, unanimously approved on Wednesday, that threatens both Sudan and South Sudan with sanctions if the African neighbors fail to halt an escalating conflict. Lucas Jackson/Reuters
A woman runs along a road during an air strike by the Sudanese air force in Rubkona near Bentiu April 23, 2012. Sudanese warplanes carried out air strikes on South Sudan, killing three people near the southern oil town of Bentiu, residents and military officials said, three days after South Sudan pulled out of a disputed oil field. Goran Tomasevic/Reuters
Supporters of Sudan People's Liberation Movement (SPLM) take part in a rally in support of South Sudan taking control of the Heglig oil field, in Juba April 13, 2012. The African Union denounced South Sudan's occupation of a vital oil field in a disputed border region with Sudan as illegal, and urged the two former civil war foes to work to avert a 'disastrous' war. Reuters
John Sorbo, mine clearing expert working for the Norwegian People's Aid organization, one of the three foreigners arrested in the disputed Heglig border area, exits a plane in Khartoum April 28, 2012. Sudan said it had arrested a Briton, a Norwegian and a South African on Saturday for illegally entering an oil-producing border area with a soldier from South Sudan. Mohamed Nureldin Abdallah/Reuters
Sudanese President Omar al-Bashir (l.) visits a damaged oil field in Heglig, Sudan, Monday, April 23, 2012. Sudanese warplanes bombed a market and an oil field in South Sudan, killing at least two people hours after Sudanese ground forces reportedly crossed into South Sudan with tanks and artillery, elevating the risk of all-out war between the two old enemies. AP
Freed Sudanese prisoners of war arrive at Khartoum Airport April 26, 2012. South Sudan freed prisoners of war on Wednesday as clashes appeared to abate between north and south, after cross-border fighting that threatened to tip into all-out war. The SPLA (South Sudan's army) handed over prisoners of war to the ICRC. Mohamed Nureldin Abdallah/Reuters
Sudanese engineers check the damage to an oil tank at a largely damaged oil field in Heglig April 23, 2012. Weeks of border fighting have brought the neighbours closer to a full-blown war than at any time since the South split away from Sudan as an independent country in July. Mohamed Nureldin Abdallah/Reuters
South Sudan's army, or the SPLA, soldiers look at a hole on the ground from a missile fired by Sudanese air force during a recent air strike in Halop, Unity state, April 24, 2012. Goran Tomasevic/Reuters
Members of the Sudanese Women's Union demonstrate outside the UN building against South Sudan's taking control of the Heglig oil field and in support of Sudan's armed forces (SAF) in Khartoum April 19, 2012. Reuters
Women from the north and the south wait for transport in Khartoum April 30, 2012. Mohamed Nureldin Abdallah/Reuters
A couple stands in front of their shelter in Bram village in the Nuba Mountains in South Kordofan April 28, 2012. Fleeing aerial bombardment by the Sudanese air force thousands of people have abandoned their homes and made makeshift shelters between the rocks and boulders. Goran Tomasevic/Reuters
A girl and her brother sit in a cave shelter in Tess village in the rebel-held territory of the Nuba Mountains in South Kordofan, on May 2, 2012. Fleeing aerial bombardment by the Sudanese air force, thousands of people have abandoned their homes and made makeshift shelters between the rocks and boulders. Goran Tomasevic/Reuters