A Volkswagen 2016 Touareg TDI is seen at a VW dealership in the Queens borough of New York, September 21, 2015. Volkswagen shares plunged more than 20 percent on Monday, their biggest ever one-day fall, after news that the German carmaker had rigged U.S. emissions tests, and Germany said it would investigate whether data had been falsified in Europe too. REUTERS/Shannon Stapleton 

A Volkswagen 2016 Touareg TDI is seen at a VW dealership in the Queens borough of New York, September 21, 2015. Volkswagen shares plunged more than 20 percent on Monday, their biggest ever one-day fall, after news that the German carmaker had rigged U.S. emissions tests, and Germany said it would investigate whether data had been falsified in Europe too. REUTERS/Shannon Stapleton 

A Tuareg metal smith shows his handy work at a camp for Malian refugees in Goudebou, Burkina Faso April 5, 2014. Half a million people fled the conflict in Mali, some crossing the border to neighbouring Burkina Faso. Fleeing Tuaregs took with them their livestock and servants from the Bella ethnic group, a marginalised people who for centuries have been kept in slave-like conditions throughout Mali, Niger and Mauritania. To match story MALI-SLAVES/ Picture taken April 5, 2014. REUTERS/Misha Hussain (BURKINA FASO - Tags: SOCIETY IMMIGRATION) 

A Tuareg band performs folkloric songs in the desert during the 19th Ghat Festival of Culture and Tourism, in Ghat, about 1,360 km (845 miles) south of Tripoli December 30, 2013. In the annual event, Tuareg tribes from the region and tourists meet to celebrate Tuareg traditional culture, folklore and heritage. Picture taken December 30, 2013. REUTERS/Esam Omran Al-Fetori (LIBYA - Tags: TRAVEL SOCIETY TPX IMAGES OF THE DAY) 

A Tuareg band performs a traditional dance during the 19th Ghat Festival of Culture and Tourism, in Ghat, about 1,360 km (845 miles) south of Tripoli December 29, 2013. In the annual event, Tuareg tribes from the region and tourists meet to celebrate Tuareg traditional culture, folklore and heritage. Picture taken December 29, 2013. REUTERS/Esam Omran Al-Fetori (LIBYA - Tags: TRAVEL SOCIETY) 

A Tuareg band performs a traditional dance during the 19th Ghat Festival of Culture and Tourism, in Ghat, about 1,360 km (845 miles) south of Tripoli December 29, 2013. In the annual event, Tuareg tribes from the region and tourists meet to celebrate Tuareg traditional culture, folklore and heritage. Picture taken December 29, 2013. REUTERS/Esam Omran Al-Fetori (LIBYA - Tags: TRAVEL SOCIETY) 

A Malian soldier speaks with Tuareg men Seydou (C) and Abdoul Hassan in the village of Tashek, outside Timbuktu, July 27, 2013. Mali holds a presidential election on Sunday after more than a year of turmoil including a coup and a French-led military intervention to free the north from al Qaeda-allied Islamist rebels. REUTERS/Joe Penney (MALI - Tags: SOCIETY POLITICS ELECTIONS) 

Representatives of Tuareg separatist rebel groups MNLA and HCUA attend a meeting with the United Nations in Bamako July 22, 2013. Mali's interim President Dioncounda Traore met for the first time with members of two northern Tuareg separatist groups, provoking anger among many in the country's south as ethnic tensions rise ahead of a presidential poll on Sunday. REUTERS/Joe Penney (MALI - Tags: ELECTIONS POLITICS CIVIL UNREST) 

Ethnic Tuareg Malian soldiers, under the command of Col. El Hadj Ag Gamou, occupy a former petrol station in Gao March 4, 2013. France said on Sunday a third French soldier had been killed in fierce fighting with Islamist rebels in northern Mali but could not confirm Chad's report that its troops had killed the al Qaeda commander behind January's mass hostage-taking in Algeria. Mali's army, meanwhile, said it had killed 52 Islamist rebels in desert fighting some 70 km (45 miles) east of Gao, northern Mali's largest town, with support from French helicopters and ground troops. REUTERS/Joe Penney (MALI - Tags: MILITARY CIVIL UNREST POLITICS) 

Ethnic Tuareg Malian soldiers under the command of Col. El Hadj Ag Gamou pose for a picture before departing on a patrol in Gao, March 3, 2013. REUTERS/Joe Penney (MALI - Tags: CIVIL UNREST CONFLICT MILITARY TPX IMAGES OF THE DAY) 

An ethnic Tuareg Malian soldier under the command of Col. El Hadj Ag Gamou stands guard at a checkpoint in Gao, March 3, 2013. REUTERS/Joe Penney (MALI - Tags: CIVIL UNREST CONFLICT MILITARY) 

Tuareg soldiers in the Malian army rest in the northern city of Gao, Mali February 9 2013. REUTERS/Francois Rihouay (MALI - Tags: POLITICS CIVIL UNREST CONFLICT TPX IMAGES OF THE DAY) 

Libyan Touareg women from the Libyan Sahara desert loyal to Libya's leader Muammar Gaddafi perform at Green Square in Tripoli April 6, 2011. REUTERS/Zohra Bensemra (LIBYA - Tags: POLITICS CIVIL UNREST) 

A Tuareg elder arrives at a news conference led by members of Libyan tribes at a hotel in Tripoli March 14, 2011. Tripoli, home to up to 2 million of Libya's 7 million people, came to a standstill last month as rebels made quick advances from their eastern stronghold. The capital has now returned to its usual self, with shops bustling with activity and cars honking their way through its chaotic streets. REUTERS/Chris Helgren (LIBYA - Tags: POLITICS CIVIL UNREST) 

A Tuareg caravan travels north through a remote region of southern Niger in this July 4, 2005 file photo. European tourists have flocked to the desert in northern Niger for years to visit nomadic camps, ancient ruins or camp under the stars. But the once-steady flow of 5,000 or so who annually took charter jets directly to the region has dried up since Tuareg nomads took up arms in 2007, turning its spectacular dunes, mountains and oases into a battlefield. To match feature NIGER-TOURISM/SECURITY REUTERS/Finbarr O'Reilly/Files (SOCIETY TRAVEL CIVIL UNREST) 

A Tuareg man poses for photographs in his shop in a market in the southern city of Tamanrasset, 2000 km (1242 miles) south of Algiers February 24, 2010. REUTERS/Zohra Bensemra (ALGERIA - Tags: SOCIETY) 

A Tuareg man sits in his shop in a market in the southern city of Tamanrasset, 2000 km (1242 miles) south of Algiers February 24, 2010. REUTERS/Zohra Bensemra (ALGERIA - Tags: SOCIETY) 

A Touareg man is reflected on the mirror of a handmade box, at a gallery in the southern city of Tamanrasset February 24, 2010. REUTERS/Zohra Bensemra (ALGERIA - Tags: SOCIETY) 

A Touareg man stands waits for customers in his shop in a market in the southern city of Tamanrasset February 24, 2010. REUTERS/Zohra Bensemra (ALGERIA - Tags: SOCIETY) 

Tuareg women clap their hands during the official visit of Algeria's President Abdelaziz Bouteflika in the southern city of Tamanrasset January 7, 2008. REUTERS/Zohra Bensemra (ALGERIA) 

Algeria's Culture Minister Khalida Toumi (L) sings with tuareg people during the official visit of President Abdelaziz Bouteflika (not pictured) in the southern city of Tamanrasset January 7, 2008. REUTERS/Zohra Bensemra (ALGERIA) 

A Tuareg woman crosses the street in front of a mud building in the Old Quarter of the desert city of Agadez December 20, 2006. Agadez has since the Middle Ages, been a way station for Muslim traders and pilgrim caravans crossing the Sahara desert. REUTERS/Tientan Ling (NIGER) 

A Tuareg nomad stands near the 13th century mosque at Timbuktu, Mali, where U.S. Special Forces have been training the Malian army to better police the Sahara Desert, March 19, 2004. The Tuaregs, many of whom make their living from tourism, fear the presence of U.S. troops will damage their livelihoods. REUTERS/Luc Gnago TO MATCH FEATURE MALI-USA-NOMADS PP04040001 AFFO LG/CRB