South Sudan army soldiers stand next to a destroyed motorcycle near Bor Airport
South Sudan army soldiers stand next to a destroyed motorcycle near Bor Airport, 180 km (108 miles) northwest from capital Juba December 25, 2013. South Sudanese troops have retaken the flashpoint town of Bor in Jonglei state, a week after the town fell to rebels loyal to rebel leader Riek Machar. REUTERS/James Akena (SOUTH SUDAN - Tags: POLITICS CIVIL UNREST MILITARY)
Men guard drinks and boxes of daily produce by a roadside in Bor
Men guard drinks and boxes of daily produce by a roadside in Bor, 180 km (108 miles) northwest from capital Juba December 25, 2013. South Sudanese troops have retaken the flashpoint town of Bor in Jonglei state, a week after the town fell to rebels loyal to rebel leader Riek Machar. REUTERS/James Akena (SOUTH SUDAN - Tags: POLITICS CIVIL UNREST)
A man holds a shoe by biting on its shoelace as he carries boxes of daily produce in Bor
A man holds a shoe by biting on its shoelace as he carries boxes of daily produce in Bor, 180 km (108 miles) northwest from capital Juba December 25, 2013. South Sudanese troops have retaken the flashpoint town of Bor in Jonglei state, a week after the town fell to rebels loyal to rebel leader Riek Machar. REUTERS/James Akena (SOUTH SUDAN - Tags: POLITICS CIVIL UNREST)
A South Sudan police officer gives a thumbs up sign as he rests in Bor
A South Sudan police officer gives a thumbs up sign as he rests in Bor, 180 km (108 miles) northwest from capital Juba December 25, 2013. South Sudanese troops have retaken the flashpoint town of Bor in Jonglei state, a week after the town fell to rebels loyal to rebel leader Riek Machar. REUTERS/James Akena (SOUTH SUDAN - Tags: POLITICS CIVIL UNREST)
A South Sudan army soldier holds his weapon in Bor
A South Sudan army soldier holds his weapon in Bor, 180 km (108 miles) northwest from capital Juba December 25, 2013. South Sudanese troops have retaken the flashpoint town of Bor in Jonglei state, a week after the town fell to rebels loyal to rebel leader Riek Machar. REUTERS/James Akena (SOUTH SUDAN - Tags: POLITICS CIVIL UNREST MILITARY)
A South Sudan army soldier holds his weapon in Bor
A South Sudan army soldier holds his weapon in Bor, 180 km (108 miles) northwest from capital Juba December 25, 2013. South Sudanese troops have retaken the flashpoint town of Bor in Jonglei state, a week after the town fell to rebels loyal to rebel leader Riek Machar. REUTERS/James Akena (SOUTH SUDAN - Tags: POLITICS CIVIL UNREST MILITARY)
A South Sudan army soldier, with a national flag wrapped around his head, holds his weapon in Bor
A South Sudan army soldier, with a national flag wrapped around his head, holds his weapon in Bor, 180 km (108 miles) northwest from capital Juba December 25, 2013. South Sudanese troops have retaken the flashpoint town of Bor in Jonglei state, a week after the town fell to rebels loyal to rebel leader Riek Machar. REUTERS/James Akena (SOUTH SUDAN - Tags: POLITICS CIVIL UNREST MILITARY)
An aerial view shows temporary settlements set up along the banks of river Nile by people displaced by fighting between the government army and rebels in Bor
An aerial view shows temporary settlements set up along the banks of river Nile by people displaced by fighting between the government army and rebels in Bor, 180 km (108 miles) northwest from capital Juba December 25, 2013. South Sudanese troops have retaken the flashpoint town of Bor in Jonglei state, a week after the town fell to rebels loyal to rebel leader Riek Machar. REUTERS/James Akena (SOUTH SUDAN - Tags: POLITICS CIVIL UNREST MILITARY)
A man rides on a donkey past South Sudan army soldiers in Bor
A man rides on a donkey past South Sudan army soldiers in Bor, 180 km (108 miles) northwest from capital Juba December 25, 2013. South Sudanese troops have retaken the flashpoint town of Bor in Jonglei state, a week after the town fell to rebels loyal to rebel leader Riek Machar. REUTERS/James Akena (SOUTH SUDAN - Tags: POLITICS CIVIL UNREST ANIMALS MILITARY)
South Sudan army soldiers hold their weapons as they ride on a truck in Bor
South Sudan army soldiers hold their weapons as they ride on a truck in Bor, 180 km (108 miles) northwest from capital Juba December 25, 2013. South Sudanese troops have retaken the flashpoint town of Bor in Jonglei state, a week after the town fell to rebels loyal to rebel leader Riek Machar. REUTERS/James Akena (SOUTH SUDAN - Tags: POLITICS CIVIL UNREST MILITARY)