A skull is pictured as participants parade through the town during the annual Bonfire Night festivities in Lewes, Britain, November 5, 2019. REUTERS/Toby Melville

A sign of a minefield is seen in Zeleni Jadar near Srebrenica, Bosnia and Herzegovina, September 28, 2018. REUTERS/Dado Ruvic SEARCH "BOSNIA DISPLACED" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Jolly Rogers pirate flag and Icelandic flags are seen at the Icelandic Pirate Party’s headquarters in Reykjavik, Iceland, September 19, 2016. Picture taken September 19, 2016. REUTERS/Stine Jacobsen

Jolly Rogers pirate flag and Icelandic flags are seen at the Icelandic Pirate Party’s headquarters in Reykjavik, Iceland, September 19, 2016. Picture taken September 19, 2016. REUTERS/Stine Jacobsen

An anti bullfighting protester with 'Fiestas without Animal Abuse' written on his chest is chased by assistants during a bullfight by Spanish matador Juan Jose Padilla at the San Fermin festival in Pamplona, July 13, 2015. REUTERS/Vincent West TPX IMAGES OF THE DAY

A Jolly Roger flag is pictured outside German mail carrier Deutsche Post headquarters during a demonstration of Verdi union members in Bonn, Germany, June 18, 2015. Workers at Deutsche Post are on strike over labour union Verdi's demands in a dispute over pay and conditions. REUTERS/Wolfgang Rattay

De-mining teams searches for landmines in the desert east of Basra province, April 1, 2015. In Iraq's vast southern desert, de-mining teams are working to remove millions of Saddam-era landmines and explosive ordnance that litter Iraq's southern giant oil fields, hampering the country's oil boom and delaying investment. Picture taken April 1 2015. REUTERS/Essam Al-Sudani

A sign is pictured at the perimeter of the former Nazi German concentration and extermination camp Auschwitz in Oswiecim January 26, 2015. Ceremonies to mark the 70th anniversary of the liberation of the camp will take place on January 27, with some 300 former Auschwitz prisoners taking part in the commemoration event. Nazi Germany built the Auschwitz camp in 1940 as a place of incarceration for the Poles. From 1942, it became the largest site of extermination of the Jews from Europe. In Auschwitz, Nazis killed at least 1.1 million people, mainly Jews, but also Poles, Roma, Soviet prisoners of war and prisoners of other ethnicities. On January 27, 1945 the camp was liberated by the Red Army soldiers. REUTERS/Laszlo Balogh (POLAND - Tags: ANNIVERSARY SOCIETY CONFLICT)

A tattooed women follows the show of designer Lena Hoschek at the Berlin Fashion Week Autumn/Winter 2015 in Berlin January 20, 2015. REUTERS/Hannibal Hanschke (GERMANY - Tags: FASHION TPX IMAGES OF THE DAY)

The Jolly Roger flies from a house in the Loyalist Ballymacash estate on the outskirts of the city of Lisburn August 18, 2014. The flag is flown as a warning to non-residents that they are entering a Loyalist Paramilitary controlled area. In Belfast, the flags of Israel and the Palestinians are potent symbols of conflict, but they divide Catholics and Protestants rather than Jews and Muslims. In the complex web of alliances that underpins Northern Ireland politics, the star of David has been adopted by pro-British Loyalists, mainly Protestants, many of whom sympathise with Israel's struggle against Islamic militants. Flying the green, black and red of flag of the Palestinian territories, meanwhile, is a sign of support for Catholic Irish Nationalism and their aspiration for a united Ireland against what many see as a British occupation. The flags are among dozens that have been adopted by the working class Catholic and Protestant areas that have for decades been at the focus of sectarian violence in Northern Ireland. Picture taken August 18, 2014. REUTERS/Cathal McNaughton (NORTHERN IRELAND - Tags: POLITICS CIVIL UNREST)

ATTENTION EDITORS: PICTURE 03 OF 23 FOR WIDER IMAGE PACKAGE 'NORTHERN IREALND - FLYING THE FLAGS'. TO FIND ALL IMAGES SEARCH 'FLAG CATHAL'

A warning sign is pictured at chemical weapons destruction site at GEKA (Gesellschaft zur Entsorgung von chemischen Kampfstoffen und Ruestungsaltlasten) company in Munster October 14, 2013. The state-owned GEKA, translated as society for the disposal of chemical weapons and ordnance, is the only German company which is able to destroy chemical munitions countrywide. GEKA is currently destroying German world-war chemical munitions. REUTERS/Fabrizio Bensch (GERMANY - Tags: MILITARY)

A Greenpeace activist lights candles to mourn victims of the Fukushima earthquake and tsunami in downtown Bucharest March 10, 2013, a day before the second-year anniversary of the disaster that killed thousands and set off a nuclear crisis. REUTERS/Bogdan Cristel (ROMANIA - Tags: DISASTER ANNIVERSARY)

A sign reads "Products for Destruction" on the door at a central purchasing warehouse as employees prepare cases of frozen beef lasagne dinners removed from stores and prepared for destruction in Villeneuve, Southwestern France, February 15, 2013. An investigation has identified a French meat-processing firm as a likely culprit in the horsemeat scandal that has enraged consumers across Europe and implicated traders and abattoirs from Cyprus to Romania.REUTERS/Regis Duvignau (FRANCE - Tags: FOOD BUSINESS POLITICS)

A man affiliated with the Occupy Toronto smokes a cigarette during "May Day" protests at Queens park in Toronto, May 1, 2012. REUTERS/Mark Blinch (CANADA - Tags: BUSINESS POLITICS CIVIL UNREST TPX IMAGES OF THE DAY)

Protestors wearing Guy Fawkes masks participate in a demonstration against the Anti-Counterfeiting Trade Agreement (ACTA) in Berlin February 25, 2012. Protesters fear that ACTA, which aims to cut trademark theft and other online piracy, will curtail freedom of expression, curb their freedom to download movies and music for free and encourage Internet surveillance. REUTERS/Tobias Schwarz (GERMANY - Tags: POLITICS CIVIL UNREST TPX IMAGES OF THE DAY)

EDITORS' NOTE: Reuters and other foreign media are subject to Iranian restrictions on leaving the office to report, film or take pictures in Tehran.
Iranian protesters climb over the gate of the British embassy in Tehran November 29, 2011. Iranian protesters stormed two British Embassy compounds in Tehran on Tuesday, smashing windows, hurling petrol bombs and burning the British flag in a protest against sanctions imposed by Britain, live Iranian television showed. REUTERS/Raheb Homavandi (IRAN - Tags: POLITICS CIVIL UNREST)

Biruntha Ravichandran, 21, a deminer working for the Swiss Foundation for Mine Action (FSD), searches for mines in a mine field in Kannaddi, located in Mannar district in Sri Lanka, September 8, 2011. Post-war Sri Lanka will need another decade to clear the half million landmines which lie buried under swathes of agricultural and forest land and around villages in the north of the island nation, the head of a demining group said. Picture taken September 8, 2011. To match interview SRILANKA-WAR/LANDMINES. REUTERS/ALERTNET/Nita Bhalla (SRI LANKA - Tags: MILITARY POLITICS)

Chicken dolls are pictured as 'Campact!' environmental activists perform a protest in Berlin January 18, 2011. German Agriculture Minister Ilse Aigner is holding a meeting with the Germany's federal states agriculture ministers to discuss her action plan to enforce higher standards in animal feed production after a health alert following the discovery of the highly toxic chemical dioxin in feed. The banner reads "Stop agricultural factories". REUTERS/Fabrizio Bensch (GERMANY - Tags: POLITICS FOOD CIVIL UNREST)

A Maersk supply boat navigates past a mine field left over from the 1982 war between Argentina and Great Britain, as it sails to the Ocean Guardian semi-submersible drilling rig contracted from Diamond Offshore Drilling by Desire Petroleum which began oil exploration, some 150 km (93 miles) offshore from the Falkland Islands, in Port Stanley in this February 26, 2010 file photo. Because of their potential volatility, small companies in risky industries like oil exploration are a favourite topic on internet bulletin boards. On the Interactive Investor (iii) forum in October, for instance, Falklands oil explorer Desire Petroleum was one of the most talked about stocks. To match Special Report ONLINE-STOCKS REUTERS/Gary Clement/Files (FALKLAND ISLANDS - Tags: BUSINESS) POLITICS ENERGY)

Revellers take part in a gay pride parade along the Masaya Highway in Managua June 28, 2010. REUTERS/Oswaldo Rivas (NICARAGUA - Tags: SOCIETY)

Demonstrators protest against Israeli military actions outside the White House in Washington June 1, 2010. The demonstration was held in response to the Israeli marine storming of a Turkish-backed aid flotilla destined for Gaza, a confrontation that left nine people dead. REUTERS/Kevin Lamarque (UNITED STATES - Tags: POLITICS)

A U.S. Army soldier with the 293D Military Police Company, 97th Military Police Battalion, takes off the barrel of his machine gun after a patrol on the outskirts of the town of Kandahar, southern Afghanistan March 21, 2010. REUTERS/Shamil Zhumatov (AFGHANISTAN - Tags: MILITARY CONFLICT)

A protester wearing a gas mask holds a poster during a demonstration against the disputed auction of a Ukrainian Black Sea chemical plant in Kiev September 29, 2009. The poster shows a skull with a hairstyle similar to that of Premier Yulia Tymoshenko. The sign reads, "Look out! Chemical Unsafe". The auction of the Ukrainian Black Sea chemical plant plunged into confusion on Tuesday with Ukraine's Nortima first being declared the winner and then being told its $624 million offer had been rejected. REUTERS/Vladimir Sindeyev (UKRAINE POLITICS CONFLICT BUSINESS IMAGES OF THE DAY)

An activist from Myanmar steps on portraits of Myanmar military leaders during a rally demanding the release of pro-democracy leader Aung San Suu Kyi in front of the Myanmar Embassy in Seoul August 16, 2009. U.S. Senator Jim Webb met Myanmar top military leader Than Shwe and opposition leader Suu Kyi on Saturday and announced the release of an American jailed for visiting the Nobel peace laureate. REUTERS/Jo Yong-Hak (SOUTH KOREA POLITICS CONFLICT)

An Iraqi special forces soldier stand guard at a checkpoint during a celebration of the U.S. withdrawal from Iraqi cities in Basra, 420 km (260 miles) southeast of Baghdad, June 30, 2009. U.S. troops pulled out of Baghdad on Monday, triggering jubilation among Iraqis hopeful that foreign military occupation is ending six years after the invasion to depose Saddam Hussein. REUTERS/Atef Hassan (IRAQ MILITARY)

A supporter of Sweden's Pirate Party waves the Jolly Roger flag at an election night party as results are announced in EU Parliamentary elections in Stockholm June 7, 2009. REUTERS/Bob Strong (SWEDEN POLITICS ELECTIONS)

An employee from the Continental tyres company of Clairoix, northern France, demonstrates in Sarreguemines on March 31, 2009. Continental announced earlier this month that it will cut nearly 2,000 jobs and close production at two high-cost European tyre manufacturing sites amid a severe crisis in the auto industry. REUTERS/Vincent Kessler (FRANCE POLITICS BUSINESS CONFLICT)

Spain's Minister of Defence Carme Chacon holds a T-shirt before troops leaving for Somalia to take part in a military mission against maritime piracy from the naval base in Rota, southern Spain March 23, 2009. The Spanish government confirmed on Sunday it would withdraw most of its 600 troops from Kosovo by the end of the summer, backtracking on an earlier statement suggesting that the forces may remain longer. REUTERS/Marcelo del Pozo (SPAIN MILITARY POLITICS)

A sign warning of mines is placed on a road as Cambodian soldiers search for mines on the outskirts of Pailin, a former Khmer Rouge stronghold, in western Cambodia's Battambang province February 13, 2009. A landmine exploded nearby a day earlier, killing a family of three, local said. On February 17 Cambodia's UN-backed genocide tribunal will try the first of five Khmer Rouge leaders blamed for the deaths of 1.7 million people in the 1970s. REUTERS/Adrees Latif (CAMBODIA)

A woman shows off her tattoos during a tattoo expo in Budapest November 30, 2008. REUTERS/Laszlo Balogh (HUNGARY)

Residents walk near a warning sign, at their village in the disputed border area with Cambodia, near the Preah Vihear temple, in Si Sa Ket province, northeast of Bangkok, October 16, 2008. Thai and Cambodian military commanders held talks across their disputed border on Thursday after the most serious clash in years left two Cambodian soldiers dead and 10 Thais in Cambodian hands. REUTERS/Chaiwat Subprasom (THAILAND)

An ultra-nationalist protester stands in front of a flag decorated with pictures of war crimes suspect Radovan Karadzic and reading: "Freedom or death" during a rally in support of Karadzic in Belgrade July 29, 2008. Hardline Serbian nationalists demonstrated in support of Karadzic on Tuesday while his legal team tried to block his extradition to an international tribunal. REUTERS/Djordje Kojadinovic (SERBIA)

A banner painted with a skull and crossbones is seen during a demonstration in Damietta city, 200 kms northeast of Cairo, Egypt, June 17, 2008. REUTERS/Asmaa Waguih (EGYPT)

A demonstrator carries a banner during a protest in Damietta city, 200 km northeast of Cairo, June 17, 2008. More than 2,000 demonstrators marched to local government offices on Tuesday to demand a halt in the construction of a nearby fertiliser plant. Construction of the plant, an $850 million joint Egyptian-Canadian project by a new company called E-Agrium, has already begun on the nearby island of Ras al-Barr, one of Egypt's most popular tourist resorts. REUTERS/Nasser Nuri (EGYPT)

Writer Diablo Cody, dressed in John Galliano for Christian Dior, nominated for best original screenplay for "Juno" for the Oscar, arrives at the 80th annual Academy Awards in Hollywood February 24, 2008. REUTERS/Lucas Jackson (UNITED STATES-OSCARS)

Writer Diablo Cody, dressed in John Galliano for Christian Dior, nominated for best original screenplay for "Juno" at the Oscar, arrives at the 80th annual Academy Awards in Hollywood February 24, 2008. REUTERS/Lucas Jackson (UNITED STATES-OSCARS)

Skinheads from Europe attend the "Day of Pride" in Budapest's Heroes Square February 9, 2008. The group is commemorating the breakout attempt by Schutzstaffel (SS) troops from Soviet-surrounded Budapest during World War Two. The Schutzstaffel was a Nazi military organisation under Adolf Hitler and the Nazi Party. REUTERS/Laszlo Balogh (HUNGARY)

Left-wing demonstrators hold a protest march in Copenhagen September 6, 2007. REUTERS/Bob Strong (Denmark)

A skull flag waves over the "Chaos Communication Camp - The International Hacker Meeting 2007" at a hangar of a former Soviet airfield in Finowfurt north of Berlin August 8, 2007. The five-day international open-air hacker conference takes place at the location of the Luftfahrtmuseum Finowfurt, next to the Airport Finow. It features two conference tracks with lectures and workshops. REUTERS/Hannibal Hanschke (GERMANY)

Revellers wait to pitch a tent during the Glastonbury music festival in Somerset, south-west England, June 21, 2007. REUTERS/Dylan Martinez (BRITAIN)

Partizan fans light torches and wave flags during their Serbia Cup semi-final match against Red Star in Belgrade April 18, 2007. REUTERS/Ivan Milutinovic (SERBIA)

Worshipper march in a procession marking the Via Crucis, or Way of the Cross, during Good Friday celebrations in the central Italian town of Gubbio April 6, 2007. REUTERS/Daniele La Monaca (ITALY)

British rock star Roger Waters, former Pink Floyd band's member, performs during his "The Dark Side of The Moon" tour in Santiago March 14, 2007. REUTERS/Vìctor Ruiz Caballero (CHILE)

A view of ground zero, the site of explosion, at the French nuclear tests' site in In-Ekker near Ain Maguel, 170 km (106 miles) from the southern Algerian town of Tamanrasset February 16, 2007. France should apologise for atom bomb tests in its former colony Algeria which were an atrocious crime that harmed humans and the environment, an Algerian official said on Tuesday. The Arabic script reads: "Nuclear tests site of the former French colony from 1960 to 1967 in Taorirt mountain in In-Ekker near Ain Maguel." Picture taken February 16, 2007. REUTERS/Zohra Bensemra (ALGERIA)

Sign placed on a side road warns locals to beware of landmines in Stanley on September 6, 2005. Most of the 150 minefields were laid around Stanley when the Argentine forces landed there on April 2, 1982 to claim the islands taken by the British in 1833. British forces defeated the Argentines 10 weeks later in a brutal war that killed 650 Argentines and 250 British. Some mines were cleared right after the conflict in a joint British-Argentine effort. Today there are 117 minefields left, 87 of them in the Stanley area where two-thirds of the islands' 2,900 people live. Picture taken September 6. To match feature Falklands-Mines. REUTERS/Enrique Marcarian

Signs placed on a side road warn locals to steer clear from land mines in Stanley on September 6, 2005. Most of the 150 minefields were laid around Stanley when the Argentine forces landed there on April 2, 1982 to claim the islands taken by the British in 1833. British forces defeated the Argentines 10 weeks later in a brutal war that killed 650 Argentines and 250 British. Some mines were cleared right after the conflict in a joint British-Argentine effort. Today there are 117 minefields left, 87 of them in the Stanley area where two-thirds of the islands' 2,900 people live. Picture taken September 6. To match feature Falklands-Mines. REUTERS/Enrique Marcarian

A sign is seen on a side road warning locals to steer clear from land mines which were laid in the Falkland Islands, in Stanley September 6, 2005. Most of the 150 minefields were laid around the capital Stanley when Argentine forces landed there in April 1982 to claim the islands taken by the British in 1833. The British armed forces defeated the Argentines 10 weeks later in a brutal war that killed 650 Argentines and 250 British. Picture taken September 9. REUTERS/Enrique Marcarian

Diana, Princess of Wales, holds a land mine during her visit to a mine field, January 15, 1997. Diana is on a four-day visit to Angola at the invitation of the British Red Cross to help increase the awareness of the problem of land mines world wide. REUTERS/Jose Manuel Ribeiro