Three men that Democratic Forces of Syria fighters claimed were Islamic State fighters sit on a pick-up truck while being held as prisoners, near al-Shadadi town, Hasaka countryside, Syria, February 18, 2016. REUTERS/Rodi Said

Democratic Forces of Syria fighters ride a pick-up truck with Islamic State fighters held as prisoners near al-Shadadi town, Hasaka countryside Syria February 18, 2016. REUTERS/Rodi Said

Oak barrels are stored in a cellar used for storing rare and old cognac at the Hennessy factory in Cognac, southwestern France, November 5, 2015. France's centuries-old cognac houses are raising their bets on the U.S. market with new products and campaigns to broaden the drink's appeal beyond its African American stronghold. To match story USA-COGNAC/ Picture taken November 5, 2015. REUTERS/Regis Duvignau

Glasses of Cognac are displayed at the Remy Martin headquarters in Cognac, southwestern France, November 6, 2015. France's centuries-old cognac houses are raising their bets on the U.S. market with new products and campaigns to broaden the drink's appeal beyond its African American stronghold. To match story USA-COGNAC/ Picture taken November 6, 2015. REUTERS/Regis Duvignau

A woman holds a glass of Cognac at the Remy Martin headquarters in Cognac, southwestern France, November 6, 2015. France's centuries-old cognac houses are raising their bets on the U.S. market with new products and campaigns to broaden the drink's appeal beyond its African American stronghold. To match story USA-COGNAC/ Picture taken November 6, 2015. REUTERS/Regis Duvignau

A close up of an oak barrel stored in a cellar used for storing rare and old cognac at the Hennessy factory in Cognac, southwestern France, November 6, 2015. France's centuries-old cognac houses are raising their bets on the U.S. market with new products and campaigns to broaden the drink's appeal beyond its African American stronghold. To match story USA-COGNAC/ Picture taken November 6, 2015. REUTERS/Regis Duvignau

Bottles and samples of Cognac are stored at the Hennessy factory in Cognac, southwestern France, November 5, 2015. France's centuries-old cognac houses are raising their bets on the U.S. market with new products and campaigns to broaden the drink's appeal beyond its African American stronghold. To match story USA-COGNAC/ Picture taken November 5, 2015. REUTERS/Regis Duvignau

A glass of cognac is pictured on a bar in the Manhattan borough of New York City, November 13, 2015. France's centuries-old cognac houses are raising their bets on the U.S. market with new products and campaigns to broaden the drink's appeal beyond its African American stronghold. To match story USA-COGNAC/ Picture taken November 13, 2015. REUTERS/Mike Segar

A glass of cognac is pictured on a bar in the Manhattan borough of New York City, November 13, 2015. France's centuries-old cognac houses are raising their bets on the U.S. market with new products and campaigns to broaden the drink's appeal beyond its African American stronghold. The big four producers -- LVMH Moet Hennessy, Remy Cointreau, Pernod Ricard and Beam Suntory -- have turned more of their attention to the U.S. following a drop in sales in China after an anti-graft campaign. To match story USA-COGNAC Picture taken November 13, 2015. REUTERS/Mike Segar

A glass of cognac is pictured on a bar in the Manhattan borough of New York City, November 13, 2015. France's centuries-old cognac houses are raising their bets on the U.S. market with new products and campaigns to broaden the drink's appeal beyond its African American stronghold. The big four producers -- LVMH Moet Hennessy, Remy Cointreau, Pernod Ricard and Beam Suntory -- have turned more of their attention to the U.S. following a drop in sales in China after an anti-graft campaign. To match story USA-COGNAC Picture taken November 13, 2015. REUTERS/Mike Segar

Japanese beer of brands such as Asahi, Kirin and Suntory are placed in a fridge at a store in Tokyo Octber 15, 2015. The planned $100 billion merger of Anheuser-Busch InBev and SABMiller will be a wake-up call to the overseas ambitions of Japanese brewers, which are struggling to grow at home in a saturated market with a shrinking population. Japanese beer makers including Asahi Group Holdings and Kirin Holdings Co hold more than 90 percent of their domestic market, but are tiny globally despite long-standing pledges to do more overseas as Japan's beer market slows. REUTERS/Issei Kato

Japanese beer of brands such as Asahi, Kirin and Suntory are placed in a fridge at a store in Tokyo Octber 15, 2015. The planned $100 billion merger of Anheuser-Busch InBev and SABMiller will be a wake-up call to the overseas ambitions of Japanese brewers, which are struggling to grow at home in a saturated market with a shrinking population. Japanese beer makers including Asahi Group Holdings and Kirin Holdings Co hold more than 90 percent of their domestic market, but are tiny globally despite long-standing pledges to do more overseas as Japan's beer market slows. REUTERS/Issei Kato

Japanese beer of brands such as Asahi, Kirin and Suntory are placed in a fridge at a store in Tokyo Octber 15, 2015. The planned $100 billion merger of Anheuser-Busch InBev and SABMiller will be a wake-up call to the overseas ambitions of Japanese brewers, which are struggling to grow at home in a saturated market with a shrinking population. Japanese beer makers including Asahi Group Holdings and Kirin Holdings Co hold more than 90 percent of their domestic market, but are tiny globally despite long-standing pledges to do more overseas as Japan's beer market slows. REUTERS/Issei Kato

Nancy Schleining of Schleining Genetics brands a pregnant cow, which has just arrived from Montana, at her cattle feedlot in Ault, Colorado November 21, 2011. Cattle rustlers, casting aside saddle and spurs for modern horsepower, are roaming the West with four-wheel drive and GPS technology in a resurgence of livestock thievery considered a hanging offense on the old frontier. State livestock officials said the increase in cattle crimes was linked to the slumping economy, soaring beef prices and the advent of handheld global positioning systems that allow rustlers to more easily navigate the wide-open range. They said contemporary thieves may find it more convenient and lucrative to pick off a couple cows, worth as much as $2,000 a head, than to rob a convenience store. Picture taken November 21, 2011. To match Feature CATTLE-RUSTLING/ REUTERS/Rick Wilking (UNITED STATES - Tags: ANIMALS BUSINESS)

Smoke rises from a reverse K slash over two brands burnt into a cow, which has just arrived from Montana, at a cattle feedlot in Ault, Colorado November 21, 2011. Cattle rustlers, casting aside saddle and spurs for modern horsepower, are roaming the West with four-wheel drive and GPS technology in a resurgence of livestock thievery considered a hanging offense on the old frontier. State livestock officials said the increase in cattle crimes was linked to the slumping economy, soaring beef prices and the advent of handheld global positioning systems that allow rustlers to more easily navigate the wide-open range. They said contemporary thieves may find it more convenient and lucrative to pick off a couple cows, worth as much as $2,000 a head, than to rob a convenience store. Picture taken November 21, 2011. To match Feature CATTLE-RUSTLING/ REUTERS/Rick Wilking (UNITED STATES - Tags: ANIMALS BUSINESS)

The Patek Philippe Seal (PP) is pictured on the back of the rf. 5960 chronograph model in an atelier at the Swiss watchmaker manufacture in Plan-Les-Ouates near Geneva August 17, 2009. Picture taken August 17, 2009. REUTERS/Denis Balibouse (SWITZERLAND BUSINESS)

Hot branding irons just pulled from the fire are ready for the next calf as the Hogan family brand their calves near Boulder, Colorado April 26, 2008. Babe and Leo Hogan continue to raise cattle and forage crops in the valley where their great-grandfather homesteaded since 1869. Together with family and friends, they will brand, innoculate and castrate their new calves each spring. REUTERS/Rick Wilking (UNITED STATES)

A calf belonging to the Hogan family shows the fresh brand near Boulder, Colorado April 26, 2008. Babe and Leo Hogan continue to raise cattle and forage crops in the valley where their great-grandfather homesteaded in 1869 and each Spring together with family and friends brand, innoculate and castrate their new calves. REUTERS/Rick Wilking (UNITED STATES)

A man holds a calf belonging to the Hogan family with his boot as he presses a hot branding iron into its side near Boulder, Colorado April 26, 2008. Babe and Leo Hogan continue to raise cattle and forage crops in the valley where their great-grandfather homesteaded since 1869. Together with family and friends, they will brand, innoculate and castrate their new calves each spring. REUTERS/Rick Wilking (UNITED STATES)

A man holds a calf belonging to the Hogan family with his boot as he presses a hot branding iron into its side near Boulder, Colorado April 26, 2008. Babe and Leo Hogan continue to raise cattle and forage crops in the valley where their great-grandfather homesteaded in 1869 and each Spring together with family and friends brand, innoculate and castrate their new calves. REUTERS/Rick Wilking (UNITED STATES)

A man sits on the head of a calf belonging to the Hogan family during branding near Boulder, Colorado April 26, 2008. Babe and Leo Hogan continue to raise cattle and forage crops in the valley where their great-grandfather homesteaded in 1869 and each Spring together with family and friends brand, innoculate and castrate their new calves. REUTERS/Rick Wilking (UNITED STATES)

A replica of one of three seals used by the inquisitors at a trial 700 years ago, in which Pope Clement V absolved the Knights Templar of charges of heresy, is seen in Rome October 9, 2007. A reproduction of the Latin-language minutes of trials against the Knights Templar in 1308, lost until its rediscovery in 2001, is being published by the Vatican Secret Archives at the end October. The documents, a book and parchments, costs 5,900 euros and its 799 numbered copies are destined for top libraries and medieval scholars. Picture taken October 9, 2007 REUTERS/Alessandro Bianchi (ITALY)

Replicas of the three seals used by the inquisitors at the trial 700 years ago, in which Pope Clement V absolved the Knights Templar of charges of heresy, lie on documents in Rome October 9, 2007. A reproduction of the Latin-language minutes of trials against the Knights Templar in 1308, lost until its rediscovery in 2001, is being published by the Vatican Secret Archives at the end October. The documents, a book and parchments, costs 5,900 euros and its 799 numbered copies are destined for top libraries and medieval scholars. REUTERS/Alessandro Bianchi (ITALY)

Shopkeepers arrange fake foreign brand shoes while waiting for customers at a shopping mall in Beijing March 28, 2007. China urged patience from the developed world on Tuesday as it seeks to stop infringements of patents, copyrights and other intellectual property. State Councillor Chen Zhili told a forum on intellectual property China was committed to strengthening intellectual property protections, but also urged wealthy countries to share more technology and show more understanding. REUTERS/Claro Cortes IV (CHINA)

Cesare Mazzetti marks a date stamp on a wine barrel before a wine barrel race in Montepulciano, near Siena, central Italy, September 3, 2006. The race, known as the Il Bravio delle Botti, is the highlight of a 10-day holiday dating back to the 14th century to celebrate the birth of Montepulciano's patron Saint John the Baptist, with costumed ceremonies, dance parties, street theatre performances and lavish parties served on the squares. Picture taken September 3, 2006. REUTERS/Daniele La Monaca (ITALY)

A date stamp is marked on a wine barrel before a wine barrel race in Montepulciano, near Siena, central Italy, September 3, 2006. The race, known as the Il Bravio delle Botti, is the highlight of a 10-day holiday dating back to the 14th century to celebrate Montepulciano's patron Saint John the Baptist, with costumed ceremonies, dance parties, street theatre performances and lavish parties served on the squares. Picture taken September 3, 2006. REUTERS/Daniele La Monaca (ITALY)