British actress Emma Watson (R) and Mauritanian activist Aissata Lam pose for a family photo following a meeting on gender equality at the Elysee Palace, in Paris, France February 19, 2019. Yoan Valat/Pool via REUTERS

Mauritanian president Mohamed Ould Abdel Aziz and his wife Tekber Mint Melainine Ould Ahmed arrive at the official dinner at the Orsay Museum, as part of the commemoration ceremony for Armistice Day, 100 years after the end of the First World War, in Paris, France, November 10, 2018. Ian Langsdon/Pool via REUTERS

Researchers from the Mauritanian Oceanography and Fisheries Research Institute (IMROP) sample seawater off the coast of Nouadhibou, the main port in Mauritania, April 14, 2018. Picture taken April 14, 2018. To match Special Report OCEANS-TIDE/SARDINELLA REUTERS/Sylvain Cherkaoui

The Amrigue, a research vessel used by the Mauritanian Oceanography and Fisheries Research Institute (IMROP), operates off the coast of Nouadhibou, the main port in Mauritania, April 14, 2018. Picture taken April 14, 2018. To match Special Report OCEANS-TIDE/SARDINELLA REUTERS/Sylvain Cherkaoui

An aerial view of the research catamaran Amrigue, used by the Mauritanian Oceanography and Fisheries Research Institute (IMROP), at anchor off the coast of Nouadhibou, the main port in Mauritania, April 14, 2018. Picture taken April 14, 2018. To match Special Report OCEANS-TIDE/SARDINELLA REUTERS/Sylvain Cherkaoui

Fans watch a football match, sponsored by Mauritanian fish-processing and fishmeal company Omaurci SA, in Nouadhibou, Mauritania, April 14, 2018. Picture taken April 14, 2018. To match Special Report OCEANS-TIDE/SARDINELLA REUTERS/Sylvain Cherkaoui

Football players celebrate after winning a match, sponsored by Mauritanian fish-processing and fishmeal company Omaurci SA, in Nouadhibou, Mauritania, April 14, 2018. Picture taken April 14, 2018. To match Special Report OCEANS-TIDE/SARDINELLA REUTERS/Sylvain Cherkaou

Abel Aziz Boughourbal, manager of Mauritanian fish-processing and fishmeal company Omaurci SA, presents a trophy to football players after a match sponsored by the company in Nouadhibou, Mauritania, April 14, 2018. Picture taken April 14, 2018. To match Special Report OCEANS-TIDE/SARDINELLA REUTERS/Sylvain Cherkaoui

Senegalese musician Youssou N'Dour (L) and Mauritanian film maker Abderrahmane Sissako speak during the inauguration of Alliance Francaise in Lagos, Nigeria, July 4, 2018. / AFP PHOTO / POOL / LUDOVIC MARIN

From L-R, Mauritanian film maker Abderrahmane Sissako, Senegalese musician Youssou N'Dour, Beninese singer Angelique Kidjo and Nigerian musician Femi Kuti pose at a hotel in Lagos, Nigeria, July 4, 2018. Ludovic Marin/Pool via Reuters

French President Emmanuel Macron (C) poses with Nobel Literature prize holder Wole Soyinka (2ndL), Senegalese musician Youssou N'Dour (L), Governor of Lagos Akinwunmi Ambode (2ndR) and Mauritanian film maker Abderrahmane Sissako during the inauguration of Alliance Francaise in Lagos, Nigeria, July 4, 2018. Ludovic Marin/Pool via Reuters

French President Emmanuel Macron (L) speaks next to Mauritanian film director Abderrahmane Sissako at the Afrika Shrine in Lagos, Nigeria, July 3, 2018. Picture taken July 3, 2018. Ludovic Marin/Pool via Reuters

Mauritanian Army soldiers stand on duty during the African Union (AU) Summit in Nouakchott, Mauritania, July 2, 2018. Ludovic Marin/Pool via Reuters

(From L) Mauritanian President Mohamed Ould Abdel Aziz, French President Emmanuel Macron, Chad's President Idriss Deby, Burkina Faso's President Roch Marc Christian Kabore, Niger President Mahamadou Issoufou and Mali's President Ibrahim Boubacar Keita from de G5 Sahel joint force holds a working session of the G5 Sahel "College de defense du G5 Sahel" CDS meeting in Nouakchott, Mauritania, July 2, 2018. Lukdovic Marin/Pool via Reuters

French President Emmanuel Macron salutes a woman Mauritanian official upon his arrival at Nouakchott where he will attend the African Union (AU) summit, in Mauritania, July 2, 2018. Macron, making an exceptional appearance at an African Union (AU) summit, was expected to discuss hurdles facing a five-nation French-backed anti-terror unit, the "G5 Sahel" force. Ludovic Marin/Pool via Reuters??

Niger President Mahamadou Issoufou, Mauritanian President Mohamed Ould Abdel Aziz and Malian President Ibrahim Boubacar Keita, arrive to attend the One Planet Summit in Boulogne-Billancourt, near Paris, France December 12, 2017. REUTERS/Ludovic Marin/Pool

Soccer Football - Al Ahly v Al-Faisaly - Arab Club Championship Semi final - Borg El Arab Stadium, Alexandria, Egypt - August 2, 2017 - Players of Egypt's Al Ahly argue with Mauritanian referee Ali Lemghaifry during the game after a yellow card. REUTERS/Amr Abdallah Dalsh

Soccer Football - Al Ahly v Al-Faisaly - Arab Club Championship Semi final - Borg El Arab Stadium, Alexandria, Egypt - August 2, 2017 - Mauritanian referee Ali Lemghaifry stops argument between players of Egypt's Al Ahly and Jordan's Al-Faisaly in the game. REUTERS/Amr Abdallah Dalsh

Mauritanian President Mohamed Ould Abdel Aziz talks with French President Emmanuel Macron during G5 Sahel summit at the presidential palace of Koulouba in Bamako, Mali, July 2, 2017. REUTERS/Luc Gnago

French President Emmanuel Macron talks with Mauritanian President Mohamed Ould Abdel Aziz during a G5 Sahel summit, in Bamako, Mali July 2, 2017. REUTERS/Christophe Archambault/Pool

Chad's president Idriss Deby Itno speaks with French President Emmanuel Macron as they gather with Mali's President Ibrahim Boubacar Keita, President of Burkina Faso Roch Marc Christian Kabore, Niger's President Mahamadou Issoufou and Mauritanian President Mohamed Ould Abdel Aziz for a meeting during a G5 Sahel summit, in Bamako, Mali July 2, 2017. REUTERS/Christophe Archambault/Pool

French President Francois Hollande (R) welcomes Mauritanian President Mohamed Ould Abdel Aziz upon his arrival for the inauguration of the exhibition "Tresors de l'Islam en Afrique. De Tombouctou à Zanzibar" (Islam's treasures in Africa. From Timbuktu to Zanzibar" at the Arab World Institute (Institut du Monde Arabe, IMA) in Paris, France, April 13, 2017. REUTERS/Geoffroy Van der Hasselt/Pool

(From L) French President Francois Hollande, Mauritanian President Mohamed Ould Abdel Aziz, Mali's President Ibrahim Boubacar Keita and Burkina Faso's President Roch Marc Christian Kabore during the inauguration of the exhibition "Tresors de l'Islam en Afrique. De Tombouctou à Zanzibar" (Islam's treasures in Africa. From Timbuktu to Zanzibar" at the Arab World Institute (Institut du Monde Arabe, IMA) in Paris, France, April 13, 2017. REUTERS/Geoffroy Van der Hasselt/Pool

French President Francois Hollande (C) shakes hands with Burkina Faso's President Roch Marc Christian Kaborr (R), next to Mauritanian President Mohamed Ould Abdel Aziz (L), Mali's President Ibrahim Boubacar Keita (2nd R) after delivering a speech during a visit at the exhibition "Tresors de l'Islam en Afrique. De Tombouctou à Zanzibar" (Islam's treasures in Africa. From Timbuktu to Zanzibar" at the Arab World Institute (Institut du Monde Arabe, IMA) in Paris, France, April 13, 2017. REUTERS/Geoffroy Van der Hasselt/Pool

French President Francois Hollande (R) looks at the view with Mauritanian President Mohamed Ould Abdel Aziz after visiting the exhibition "Tresors de l'Islam en Afrique. De Tombouctou à Zanzibar" (Islam's treasures in Africa. From Timbuktu to Zanzibar" at the Arab World Institute (Institut du Monde Arabe, IMA) in Paris, France, April 13, 2017. REUTERS/Geoffroy Van der Hasselt/Pool

French President Francois Hollande (C) shakes hands with Mauritanian President Mohamed Ould Abdel Aziz (R) after delivering a speech during a visit at the exhibition "Tresors de l'Islam en Afrique. De Tombouctou à Zanzibar" (Islam's treasures in Africa. From Timbuktu to Zanzibar" at the Arab World Institute (Institut du Monde Arabe, IMA) in Paris, France, April 13, 2017. At L, Head of the the Arab World Institute (IMA) Jack Lang. REUTERS/Geoffroy Van der Hasselt/Pool

A Mauritanian registered plane is seen on the tarmac of the Banjul International Airport, Gambia January 21, 2017. REUTERS/Afolabi Sotunde

At a rocky outpost in Western Sahara, a new generation of soldiers who have never known war are mobilising as tensions resurface in one of Africa's oldest disputes after a quarter century of uneasy peace. Young Sahrawi troops man new desert posts for the Polisario Front, which for more than 40 years has sought independence for the vast desert region - first in a guerrilla war against Morocco and then politically since a ceasefire deal in 1991. Now a standoff with Morocco, which controls the majority of Western Sahara, is renewing pressure for a diplomatic solution to ensure foot soldiers don't return to fighting as the last generation of commanders once did. The standoff since August has brought Moroccan and Polisario forces within 200 metres of each other in a narrow strip of land near the Mauritanian border. Rich in phosphate, Western Sahara has been contested since 1975 when Spanish colonial powers left. Morocco claimed the territory and fought the 16-year war with Polisario. REUTERS/ Zohra Bensemra SEARCH ÒPOLISARIOÓ FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY Matching text: WESTERNSAHARA-DISPUTE/

Mauritanian filmmaker Abderrahmane Sissako (L) of Mauritania and French filmmaker Regis Wargnier attend the opening of the Lumiere Grand Lyon film festival in Lyon, France, October 12, 2015. REUTERS/Robert Pratta

Mauritanian filmmaker Abderrahmane Sissako (L) of Mauritania and French filmmaker Regis Wargnier gesture for photographers at the opening of the Lumiere Grand Lyon film festival in Lyon, France, October 12, 2015. REUTERS/Robert Pratta

Mauritania's President Mohamed Ould Abdel Aziz (2nd L) meets with Chinese Premier Li Keqiang (not pictured) at the Great Hall of the People in Beijing, China September 15, 2015. REUTERS/Lintao Zhang/Pool

Mauritania's President Mohamed Ould Abdel Aziz (3rd L) meets with Chinese Premier Li Keqiang (3rd R) at the Great Hall of the People in Beijing, China September 15, 2015. REUTERS/Lintao Zhang/Pool

Mauritania's President Mohamed Ould Abdel Aziz (L) shakes hands with Chinese Premier Li Keqiang at the Great Hall of the People in Beijing, China September 15, 2015. REUTERS/Lintao Zhang/Pool

Mauritania's President Mohamed Ould Abdel Aziz (L) shakes hands with Chinese Premier Li Keqiang at the Great Hall of the People in Beijing, China September 15, 2015. REUTERS/Lintao Zhang/Pool

Spanish Defence Minister Pedro Morenes (L) talks with the representative of Mauritanian Minister of Defence Mohamed Bachir Weld El-Hadj during a family photograph session at the 5+5 Summit of Defense Ministers in Tunis, Tunisia June 9, 2015. REUTERS/Zoubeir Souissi

(From L to R) Spanish Defence Minister Pedro Morenes, the representative of Mauritanian Minister of Defence Mohamed Bachir Weld El-Hadj, Algerian secretary general of the ministry of National Defence Major General Mohamed Zenakhri, Tunisian Defence Minister Farhat Horchani, Italian Defence Minister Roberta Pinotti, French Defense Minister Jean-Yves Le Drian, Portuguese Minister of Defence Jose Pedro Aguiar-Branco and Moroccan Minister Delegate for National Defense Abdellatif Loudiyi pose during a family photograph session at the 5+5 Summit of Defense Ministers in Tunis, Tunisia June 9, 2015. REUTERS/Zoubeir Souissi

Iraq's Foreign Minister Ibrahim al-Jaafari (R) meets with his Kuwaiti counterpart Sabah Al-Khalid al-Sabah (2nd R) and Arab League Secretary-General Nabil El-Araby (L) and his Mauritanian counterpart Ahmed Teguedi in Baghdad October 19, 2014. REUTERS/Ahmed Saad (IRAQ - Tags: POLITICS)

A conveyor belt used to transport iron ore to a ship is seen at SNIM headquarters in the port of Nouadhibou June 26, 2014. Mauritania's SNIM iron ore mining company aims to produce 13 million tonnes in 2014, around the same level as last year, the majority state-owned firm said. SNIM mines black iron ore in the northern town of Zouerate, a remote desert location which nevertheless attracts people from all over the country looking for work. SNIM employees proudly call their firm the lung of their nation's economy and the train that ferries the ore to the coast stretches some two kilometres, making it one of the world's longest. Picture taken June 26, 2014. REUTERS/Joe Penney (MAURITANIA - Tags: BUSINESS COMMODITIES ENVIRONMENT SOCIETY EMPLOYMENT TPX IMAGES OF THE DAY)

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A worker welds a train car at a SNIM workshop in Nouadhibou June 26, 2014. Mauritania's SNIM iron ore mining company aims to produce 13 million tonnes in 2014, around the same level as last year, the majority state-owned firm said. SNIM mines black iron ore in the northern town of Zouerate, a remote desert location which nevertheless attracts people from all over the country looking for work. SNIM employees proudly call their firm the lung of their nation's economy and the train that ferries the ore to the coast stretches some two kilometres, making it one of the world's longest. Picture taken June 26, 2014. REUTERS/Joe Penney (MAURITANIA - Tags: BUSINESS COMMODITIES ENVIRONMENT SOCIETY EMPLOYMENT)

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A passenger on a SNIM train carrying iron ore and mine workers waits for transport after arriving in Nouadhibou June 25, 2014. Mauritania's SNIM iron ore mining company aims to produce 13 million tonnes in 2014, around the same level as last year, the majority state-owned firm said. SNIM mines black iron ore in the northern town of Zouerate, a remote desert location which nevertheless attracts people from all over the country looking for work. SNIM employees proudly call their firm the lung of their nation's economy and the train that ferries the ore to the coast stretches some two kilometres, making it one of the world's longest. Picture taken June 25, 2014. REUTERS/Joe Penney (MAURITANIA - Tags: BUSINESS COMMODITIES ENVIRONMENT SOCIETY TPX IMAGES OF THE DAY EMPLOYMENT)


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Passengers on a SNIM train carrying iron ore and mine workers arrive in Nouadhibou June 25, 2014. Mauritania's SNIM iron ore mining company aims to produce 13 million tonnes in 2014, around the same level as last year, the majority state-owned firm said. SNIM mines black iron ore in the northern town of Zouerate, a remote desert location which nevertheless attracts people from all over the country looking for work. SNIM employees proudly call their firm the lung of their nation's economy and the train that ferries the ore to the coast stretches some two kilometres, making it one of the world's longest. Picture taken June 25, 2014. REUTERS/Joe Penney (MAURITANIA - Tags: BUSINESS COMMODITIES ENVIRONMENT SOCIETY EMPLOYMENT)

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A SNIM worker oversees the transfer of iron ore to train cars at the Guelb mine site in Zouerate June 24, 2014. Mauritania's SNIM iron ore mining company aims to produce 13 million tonnes in 2014, around the same level as last year, the majority state-owned firm said. SNIM mines black iron ore in the northern town of Zouerate, a remote desert location which nevertheless attracts people from all over the country looking for work. SNIM employees proudly call their firm the lung of their nation's economy and the train that ferries the ore to the coast stretches some two kilometres, making it one of the world's longest. Picture taken June 24, 2014. REUTERS/Joe Penney (MAURITANIA - Tags: BUSINESS COMMODITIES ENVIRONMENT SOCIETY EMPLOYMENT TPX IMAGES OF THE DAY)

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A truck drives along a road at the TO-14 iron ore mine in Zouerate June 23, 2014. Mauritania's SNIM iron ore mining company aims to produce 13 million tonnes in 2014, around the same level as last year, the majority state-owned firm said. SNIM mines black iron ore in the northern town of Zouerate, a remote desert location which nevertheless attracts people from all over the country looking for work. SNIM employees proudly call their firm the lung of their nation's economy and the train that ferries the ore to the coast stretches some two kilometres, making it one of the world's longest. Picture taken June 23, 2014. REUTERS/Joe Penney (MAURITANIA - Tags: BUSINESS COMMODITIES ENVIRONMENT SOCIETY EMPLOYMENT)

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A woman shields her child from the wind while walking on sand dunes in Nouakchott June 22, 2014. REUTERS/Joe Penney (MAURITANIA - Tags: SOCIETY ENVIRONMENT)

Men watch fireworks at a campaign rally for incumbent presidential candidate Mohamed Ould Abdel Aziz in Nouakchott June 19, 2014. Mauritania will hold presidential elections on Saturday. REUTERS/Joe Penney (MAURITANIA - Tags: ELECTIONS POLITICS)

A campaign poster for incumbent presidential candidate Mohamed Ould Abdel Aziz is illuminated at night in Nouakchott, Mauritania June 18, 2014. Mauritania will hold presidential elections on Saturday. REUTERS/Joe Penney (MAURITANIA - Tags: POLITICS CITYSCAPE TPX IMAGES OF THE DAY)

Russia's Foreign Minister Sergei Lavrov (R) shakes hands with his Mauritanian counterpart Ahmed Teguedi during a news conference in Moscow, June 2, 2014. Russia will submit a draft resolution to the U.N. Security Council on Monday calling for an immediate end to violence in Ukraine and the creation of humanitarian corridors in the east of the country, Lavrov said. REUTERS/Sergei Karpukhin (RUSSIA - Tags: POLITICS)

Russian Foreign Minister Sergei Lavrov attends a news conference after a meeting with his Mauritanian counterpart Ahmed Teguedi in Moscow June 2, 2014. Russia will submit a draft resolution to the U.N. Security Council on Monday calling for an immediate end to violence in Ukraine and the creation of humanitarian corridors in the east of the country, Lavrov said. REUTERS/Sergei Karpukhin (RUSSIA - Tags: POLITICS HEADSHOT)

Russia's Foreign Minister Sergei Lavrov attends a news conference after a meeting with his Mauritanian counterpart Ahmed Teguedi in Moscow, June 2, 2014. REUTERS/Sergei Karpukhin (RUSSIA - Tags: POLITICS)

Russia's Foreign Minister Sergei Lavrov (L) and his Mauritanian counterpart Ahmed Teguedi attend a news conference in Moscow, June 2, 2014. REUTERS/Sergei Karpukhin (RUSSIA - Tags: POLITICS)

Mali's interim President Dioncounda Traore (front C, in suit) poses with his childhood friend Cheickna Sow (2nd L) and other men during his visit to the village of Toulel, 42 Km from Nara, where Malian and Nigerian troops are based, near the Mauritanian border April 14, 2013. Picture taken April 14, 2013. REUTERS/Adama Diarra (MALI - Tags: POLITICS SOCIETY)

Peuhl men welcome Mali's interim President Dioncounda Traore (not pictured) to their village of Toulel, 42 Km from Nara, where Malian and Nigerian troops are based, near the Mauritanian border, April 14, 2013. Picture taken April 14, 2013. REUTERS/Adama Diarra (MALI - Tags: POLITICS SOCIETY)

Mali's interim President Dioncounda Traore (front) tours the village of Toulel, 42 Km from Nara, where Malian and Nigerian troops are based, near the Mauritanian border April 14, 2013. Picture taken April 14, 2013. REUTERS/Adama Diarra (MALI - Tags: POLITICS MILITARY)

Malian troops stand at attention during interim President Dioncounda Traore's (not pictured) visit to their base in the town of Nara, 375 km from Bamako April 13, 2013. Mali's interim President Dioncounda Traore on Saturday visited Malian and Nigerian troops based in the town of Nara, near the Mauritanian border. Picture taken April 13, 2013. REUTERS/Adama Diarra (MALI - Tags: POLITICS MILITARY)

Mali's interim President Dioncounda Traore (C) poses for a photo with Mali's troops during his visit to their base in the town of Nara, 375 km from Bamako April 13, 2013. Mali's interim President Dioncounda Traore on Saturday visited Malian and Nigerian troops based in the town of Nara, near the Mauritanian border. Picture taken April 13, 2013. REUTERS/Adama Diarra (MALI - Tags: POLITICS MILITARY)

Mali's interim President Dioncounda Traore (C) poses for a photo with Mali's troops during his visit to their base in the town of Nara, 375 km from Bamako April 13, 2013. Mali's interim President Dioncounda Traore on Saturday visited Malian and Nigerian troops based in the town of Nara, near the Mauritanian border. Picture taken April 13, 2013. REUTERS/Adama Diarra (MALI - Tags: POLITICS MILITARY)

Mali's interim President Dioncounda Traore addresses Mali's troops during his visit to their base in the town of Nara, 375 km from Bamako April 13, 2013. Mali's interim President Dioncounda Traore on Saturday visited Malian and Nigerian troops based in the town of Nara, near the Mauritanian border. Picture taken April 13, 2013. REUTERS/Adama Diarra (MALI - Tags: POLITICS HEADSHOT MILITARY)

Mali's interim President Dioncounda Traore (C) reviews Mali's troops at their base in the town of Nara, 375 km from Bamako April 13, 2013. Mali's interim President Dioncounda Traore on Saturday visited Malian and Nigerian troops based in the town of Nara, near the Mauritanian border. Picture taken April 13, 2013. REUTERS/Adama Diarra (MALI - Tags: POLITICS MILITARY)

Mali's interim President Dioncounda Traore (C) reviews Mali's troops at their base in the town of Nara, 375 km from Bamako April 13, 2013. Mali's interim President Dioncounda Traore on Saturday visited Malian and Nigerian troops based in the town of Nara, near the Mauritanian border. Picture taken April 13, 2013. REUTERS/Adama Diarra (MALI - Tags: POLITICS MILITARY)