Scotland's First Minister tastes a strawberry tart at the young farmers stand at the Royal Highland Show in Edinburgh, Scotland June 18. REUTERS/Russell Cheyne

Britain's Prime Minister David Cameron of lunch with Lilli Docherty and her daughter Dakota in the garden with people who have benefited from tax and pension changes that came into force today, near Poole, south west England, Monday, April 6, 2015. REUTERS/Kirsty Wigglesworth/Pool 

U.S. President Barack Obama bites into a bratwurst after a visit to Usinger's Fine Sausage in Milwaukee, Wisconsin September 22, 2012.
REUTERS/Kevin Lamarque (UNITED STATES - Tags: POLITICS ELECTIONS USA PRESIDENTIAL ELECTION) 

German Chancellor and leader of Germany's conservative Christian Democratic Union (CDU), Angela Merkel eats some chocolate as she listens to a speech during the party convention at the fairground in Leipzig, November 14, 2011. The CDU will hold its annual party meeting until November 15. REUTERS/Kai Pfaffenbach (GERMANY - Tags: POLITICS TPX IMAGES OF THE DAY) 

Japan's Prime Minister Shinzo Abe, who is also leader of the ruling Liberal Democratic Party (LDP), eats a local grilled fish during his official campaign kick-off for the December 14 lower house election, at the Soma Haragama fishing port in Soma, Fukushima prefecture, December 2, 2014. REUTERS/Issei Kato (JAPAN - Tags: POLITICS ELECTIONS FOOD TPX IMAGES OF THE DAY) 

Francois Hollande, Socialist Party candidate for the 2012 French presidential election, eats a sandwich as he visits employees of ArcelorMittal in Florange, Eastern France, February 24, 2012. ArcelorMittal, the world's largest steelmaker, announced last week its decision to maintain the temporary closure of the second blast furnace at its site in Florange-Hayange, the last group still active in the Loraine region. REUTERS/Francois Lenoir (FRANCE - Tags: POLITICS ELECTIONS BUSINESS) 

US Democratic presidential candidate Senator Hillary Clinton (L) (D-NY) eats lunch at a King Taco Restaurant with Los Angeles Mayor Antonio Villaraigosa (R) in East Los Angeles, January 11, 2008. REUTERS/Danny Moloshok (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008 (USA) 

Zimbabwe's President Robert Mugabe eats cake during celebrations for his 85th birthday in Chinhoyi, about 115km west of the capital Harare, February 28, 2009. Mugabe celebrates his birthday on Saturday at a huge party which critics say is insensitive to an economic crisis which has left many families destitute. He was born on February 21 in 1924. REUTERS/Philimon Bulawayo (ZIMBABWE) 

U.S. President George W. Bush eats an ear of raw sweet corn during a visit to the Bettendorf farmers market, during a campaign stop in Iowa, August 4, 2004. [Bush is on a three-day campaign swing through middle America in the hotly contested states of Iowa, Minnesota, Ohio and Michigan.] 

New York mayor Bill de Blasio eats lunch with fifth graders at Journey Prep School on the first day of the city's public school opening in the Bronx borough of New York, September 4, 2014. REUTERS/Susan Watts/Pool (UNITED STATES - Tags: EDUCATION) 

British Prime Minister David Cameron (L) eats a hot dog with New York City Mayor Michael Bloomberg outside Penn Station in New York July 21, 2010. REUTERS/Shannon Stapleton (UNITED STATES - Tags: POLITICS BUSINESS IMAGES OF THE DAY) 

U.S. Secretary of State John Kerry eats a piece of baguette he just purchased from a Warsaw cafe, with U.S. Ambassador to Poland Stephen Mull (R), during a walking tour of the Polish capital, November 5, 2013. REUTERS/Jason Reed (POLAND - Tags: POLITICS) 

France's President and UMP party candidate for the 2012 French presidential elections Nicolas Sarkozy (L) eats lunch with employees during a visit at French engineering giant Alstom plant in Aytre, western France, February 21, 2012. REUTERS/Stephane Mahe (FRANCE - Tags: POLITICS BUSINESS TRANSPORT FOOD ELECTIONS) 

Israel's President Shimon Peres (R) and Ashdod Mayor Yehiel Lasri eat popsicles during a visit to a shopping mall in Ashdod to show solidarity with the residents of southern Israel August 22, 2011. Israel and the Islamist group Hamas, which controls the Gaza Strip, have agreed to a ceasefire after five days of cross-border violence, officials said on Monday. REUTERS/Amir Cohen (ISRAEL - Tags: POLITICS CIVIL UNREST) 

Brazilian presidential candidate for the ruling Workers Party (PT) Dilma Rousseff eats a "Pao de Queijo"(cheese bread) while campaigning in Brasilia September 28, 2010. Brazil will hold general elections on October 3. REUTERS/Ricardo Moraes (BRAZIL - Tags: POLITICS ELECTIONS) 

U.S. President Barack Obama and British Prime Minister David Cameron eat hot dogs at a first round "First Four" game of the NCAA Division I Men's Basketball Tournament between Mississippi Valley State and Western Kentucky at the University of Dayton Arena in Ohio, March 13, 2012. REUTERS/Larry Downing (UNITED STATES - Tags: POLITICS SPORT BASKETBALL TPX IMAGES OF THE DAY)