A vendor sells cakes for tourists along a railway in Hanoi, Vietnam September 28, 2019. REUTERS/Kham

Horse Racing - Royal Ascot - Ascot Racecourse, Ascot, Britain - June 21, 2019 The shadow of a racegoer before the races Action Images via Reuters/John Sibley

A demonstrator takes part in a general strike against the government's pension plan and cuts to federal spending on higher education planned by Brazil's President Jair Bolsonaro's right-wing government in Sao Paulo, Brazil June 14, 2019. The sign reads: "Reform of pension plan." REUTERS/Nacho Doce

A farmer harvests rice by a paddy field outside Hanoi, Vietnam June 10, 2019. REUTERS/Kham

A farmer harvests rice by a paddy field outside Hanoi, Vietnam June 10, 2019. REUTERS/Kham TPX IMAGES OF THE DAY

A graduating student waits to cross the street before Commencement Exercises at the Massachusetts Institute of Technology (MIT) in Cambridge, Massachusetts, U.S., June 7, 2019. REUTERS/Brian Snyder

A model poses with body art and headwear made of Peonies at the RHS Chelsea Flower Show at the Royal Hospital Chelsea, London, Britain, May 20, 2019. REUTERS/Toby Melville

A model poses with body art and headwear made of Peonies at the RHS Chelsea Flower Show at the Royal Hospital Chelsea, London, Britain, May 20, 2019. REUTERS/Toby Melville

A model poses with body art and headwear made of Peonies at the RHS Chelsea Flower Show at the Royal Hospital Chelsea, London, Britain, May 20, 2019. REUTERS/Toby Melville

Balinese Hindus wear masks as they prepare before performing sacred Telek dance at a festival in Klungkung, Bali, Indonesia, April 28, 2019. REUTERS/Johannes Christo

A member of the Orthodox clergy takes part in the Christian Orthodox Holy Fire ceremony at the Church of the Holy Sepulchre in Jerusalem's Old City, April 27, 2019 REUTERS/Amir Cohen

A protester reacts to tear gas canisters fired by police at a demonstration during the Act XXIV (the 24th consecutive national protest on Saturday) of the yellow vests movement in Strasbourg, France, April 27, 2019. REUTERS/Vincent Kessler

A boy throws an easter egg during the traditional long throw competition in Horhausen, Germany, April 21, 2019. REUTERS/Ralph Orlowski

People wearing masks march through the streets during Easter celebrations in Ceske Budejovice, Czech Republic, April 19, 2019. REUTERS/David W Cerny

A man wearing a mask prepares to march through the streets during Easter celebrations in Ceske Budejovice, Czech Republic, April 19, 2019. REUTERS/David W Cerny

Penitents attend the Procession of the Torches during Holy Week in Goias Velho, west of Brasilia, Brazil April 18, 2019. REUTERS/Adriano Machado TPX IMAGES OF THE DAY

A penitent attends the Procession of the Torches during Holy Week in Goias Velho, west of Brasilia, Brazil April 18, 2019. REUTERS/Adriano Machado

Penitents attend the Procession of the Torches during Holy Week in Goias Velho, west of Brasilia, Brazil April 18, 2019. REUTERS/Adriano Machado

Penitents attend the Procession of the Torches during Holy Week in Goias Velho, west of Brasilia, Brazil April 18, 2019. REUTERS/Adriano Machado

Penitents attend the Procession of the Torches during Holy Week in Goias Velho, west of Brasilia, Brazil April 18, 2019. REUTERS/Adriano Machado

Penitents of La Paz (The Peace) brotherhood take part in a procession during Holy Week in the Andalusian capital of Seville, Spain April 14, 2019. REUTERS/Marcelo del Pozo TPX IMAGES OF THE DAY

Penitents of La Paz (The Peace) brotherhood make their way to a church before taking part in a procession during Holy Week in the Andalusian capital of Seville, southern Spain April 14, 2019. REUTERS/Marcelo del Pozo

Penitents of La Paz (The Peace) brotherhood make their way to a church before taking part in a procession during Holy Week in the Andalusian capital of Seville, southern Spain April 14, 2019. REUTERS/Marcelo del Pozo TPX IMAGES OF THE DAY

An EU supporter, calling on the government to give Britons a vote on the final Brexit deal, participates in the 'People's Vote' march in central London, Britain March 23, 2019. REUTERS/Peter Nicholls

A visitor looks at the Flower Fields at Carlsbad Ranch as he enjoys nearly 50 acres of blooming giant Tecolote ranunculus flowers in Carlsbad, California, U.S., March 21, 2019. REUTERS/Mike Blake TPX IMAGES OF THE DAY

A participant attends the St Patrick's Day Parade in Valletta, Malta March 17, 2019. REUTERS/Darrin Zammit Lupi

Carnival revellers play their piccolos during the traditional Morgenstreich parade through the streets of Basel, Switzerland March 11, 2019. REUTERS/Arnd Wiegmann TPX IMAGES OF THE DAY

A man poses for a picture, as he vapes at home in La Paz, Bolivia, February 2, 2019. REUTERS/David Mercado

A Russian traffic police officer, whose eyelashes and headwear are covered with hoarfrost, takes part in the "Parade of Snowmen" annual city's contest at the Royev Ruchey Park of Flora and Fauna, with the air temperature at about minus 29 degrees Celsius (minus 20.2 degrees Fahrenheit), in Krasnoyarsk, Russia December 29, 2018. REUTERS/Ilya Naymushin

A protester holding a French flag takes part in a demonstration by the "yellow vests" movement near the Arc de Triomphe in Paris, France, December 22, 2018. REUTERS/Christian Hartmann

A man dressed as a demon performs during a Krampus show in Goricane, Slovenia, November 24, 2018. REUTERS/Borut Zivulovic

A man dressed as a demon performs during a Krampus show in Goricane, Slovenia, November 24, 2018. REUTERS/Borut Zivulovic

A man dressed as a demon performs during a Krampus show in Goricane, Slovenia, November 24, 2018. REUTERS/Borut Zivulovic

A man dressed as a demon performs during a Krampus show in Goricane, Slovenia, November 24, 2018. REUTERS/Borut Zivulovic

A man dressed as a demon performs during a Krampus show in Goricane, Slovenia, November 24, 2018. REUTERS/Borut Zivulovic

A man dressed as a demon performs during a Krampus show in Goricane, Slovenia, November 24, 2018. REUTERS/Borut Zivulovic

A man dressed as a demon performs during a Krampus show in Goricane, Slovenia, November 24, 2018. REUTERS/Borut Zivulovic

A debutant displays a tiara designed by Donatella Versace studded with 380 Swarovski crystals during the presentation of the debutants' headwear ahead of the traditional Opera Ball in Vienna, Austria, November 19, 2018. REUTERS/Heinz-Peter Bader

A tiara designed by Donatella Versace, studded with 380 Swarovski crystals is displayed during the presentation of the debutants' headwear ahead of the traditional Opera Ball in Vienna, Austria, November 19, 2018. REUTERS/Heinz-Peter Bader

A tiara designed by Donatella Versace, studded with 380 Swarovski crystals is displayed during the presentation of the debutants' headwear ahead of the traditional Opera Ball in Vienna, Austria, November 19, 2018. REUTERS/Heinz-Peter Bader

A tiara designed by Donatella Versace, studded with 380 Swarovski crystals is displayed during the presentation of the debutants' headwear ahead of the traditional Opera Ball in Vienna, Austria, November 19, 2018. REUTERS/Heinz-Peter Bader

A debutant displays a tiara designed by Donatella Versace studded with 380 Swarovski crystals during the presentation of the debutants' headwear ahead of the traditional Opera Ball in Vienna, Austria, November 19, 2018. REUTERS/Heinz-Peter Bader

A debutant displays a tiara designed by Donatella Versace studded with 380 Swarovski crystals during the presentation of the debutants' headwear ahead of the traditional Opera Ball in Vienna, Austria, November 19, 2018. REUTERS/Heinz-Peter Bader

A debutant displays a tiara designed by Donatella Versace studded with 380 Swarovski crystals during the presentation of the debutants' headwear ahead of the traditional Opera Ball in Vienna, Austria, November 19, 2018. REUTERS/Heinz-Peter Bader

A worker uses a grinder to give shape and shine to an iron plate as he makes a cooking utensil at a manufacturing unit in Kolkata, India, November 12, 2018. REUTERS/Rupak De Chowdhuri

Firefighters battle the Woolsey Fire as it continues to burn in Malibu, California, U.S., November 11, 2018. REUTERS/Eric Thayer TPX IMAGES OF THE DAY

A British military veteran takes part in a Remembrance Sunday commemoration ceremony on Armistice Day, 100 years after the end of World War One, at the war memorial cenotaph in Floriana, Malta November 11, 2018. REUTERS/Darrin Zammit Lupi

A youth wearing a yarmulke with a Star of David looks towards a temporary pier at the Sea of Galilee in northern Israel November 1, 2018. Picture taken November 1, 2018. REUTERS/Ronen Zvulun

Rabbis hats are silhouetted against the sky as they gather to pose for a group photo in front of the Chabad-Lubavitch world headquarters in the Brooklyn borough of New York, U.S., November 4, 2018. REUTERS/Mark Kauzlarich

A woman sells fishes at a seafood market in Ha Long Bay, Vietnam November 3, 2018. REUTERS/Kham

A man dressed up in Halloween costume takes part in the "Noche del Terror" (Horror night) during Halloween celebrations in the neighborhood of Churriana, near Malaga, southern Spain, November 2, 2018. REUTERS/Jon Nazca

Fishermen clean their nets at a beach in Nam Dinh province, Vietnam November 2, 2018. REUTERS/Kham

Fishermen clean their nets at a beach in Nam Dinh province, Vietnam November 2, 2018. REUTERS/Kham TPX IMAGES OF THE DAY

A man wears a mask as he takes part in a Catrina event ahead of the Day of the Dead, at Zocalo Square in Mexico City, Mexico October 31, 2018. REUTERS/Henry Romero

A man wears a mask as he takes part in a Catrina event ahead of the Day of the Dead, at Zocalo Square in Mexico City, Mexico October 31, 2018. REUTERS/Henry Romero

A man wears a mask as he takes part in a Catrina event ahead of the Day of the Dead, at Zocalo Square in Mexico City, Mexico October 31, 2018. REUTERS/Henry Romero

People take part in a procession up the hill of Tlachtga as part of the Flame of Samhain festival, in Athboy, Ireland, October 31, 2018. Samhain is believed to be the ancient precursor to Halloween and marks the end of the old Celtic year and the beginning of the new year where the spirits of the dead are passed onto the next world. REUTERS/Clodagh Kilcoyne

A hooded youth prepares to throw a petrol bomb during clashes with riot police as Greek students demonstrate against a draft bill changing university entrance requirements in Athens, Greece, October 29, 2018. REUTERS/Alkis Konstantinidis