A rainbow is pictured over Lac Leman during a rainstrom during a heatwave in Chexbres, Switzerland, August 8, 2018. REUTERS/Denis Balibouse

Muslims take part in evening prayers called "Tarawih" on Laylat al-Qadr or Night of Decree, at Suleymaniye mosque during the holy month of Ramadan in Istanbul, Turkey June 10, 2018. REUTERS/Huseyin Aldemir TPX IMAGES OF THE DAY

The Dome of the Rock is seen in the background as Palestinians pray on the third Friday of the holy fasting month of Ramadan, on the compound known to Muslims as Noble Sanctuary and to Jews as Temple Mount, in Jerusalem's Old City, June 1, 2018. REUTERS/Ammar Awad TPX IMAGES OF THE DAY

Jewish worshippers are seen from above during the priestly blessing prayer on the holiday of Passover, at the Western Wall in Jerusalem's Old City, April 2, 2018. REUTERS/Ronen Zvulun

A dog guards the lighthouse of Berlenga Island near Peniche, Portugal July 4, 2017. Picture taken July 4, 2017. REUTERS/Rafael Marchante TPX IMAGES OF THE DAY

Japanese Prime Minister Shinzo Abe (C) and U.S. President Barack Obama (L) bow their heads during a wreath-laying ceremony aboard the USS Arizona Memorial at Pearl Harbor, Hawaii, U.S., December 27, 2016. REUTERS/Kevin Lamarque - TPX IMAGES OF THE DAY

Toshiba Corp President and CEO Satoshi Tsunakawa attends a news conference at the company's headquarters in Tokyo, Japan, December 27, 2016. REUTERS/Toru Hanai

Toshiba Corp CEO Satoshi Tsunakawa attends a news conference at the company's headquarters in Tokyo, Japan, December 27, 2016. REUTERS/Toru Hanai TPX IMAGES OF THE DAY

Pennsylvania electors bow their heads in prayer before casting their votes for U.S. President-elect Donald Trump at the Pennsylvania State Capitol in Harrisburg, Pennsylvania, U.S. December 19, 2016. REUTERS/Jonathan Ernst

Yoo Soon-taek (C), wife of United Nations Secretary-General Ban Ki-moon, bows as she is applauded at UN headquarters in New York, U.S., December 12, 2016. REUTERS/Lucas Jackson

Football Soccer Britain - Liverpool v West Ham United - Premier League - Anfield - 11/12/16 Liverpool's Nathaniel Clyne looks dejected after missing a goal scoring opportunity Action Images via Reuters / Lee Smith Livepic EDITORIAL USE ONLY. No use with unauthorized audio, video, data, fixture lists, club/league logos or "live" services. Online in-match use limited to 45 images, no video emulation. No use in betting, games or single club/league/player publications. Please contact your account representative for further details.

Football Soccer Britain - Liverpool v West Ham United - Premier League - Anfield - 11/12/16 Liverpool's Nathaniel Clyne looks dejected after missing a goal scoring opportunity Action Images via Reuters / Lee Smith Livepic EDITORIAL USE ONLY. No use with unauthorized audio, video, data, fixture lists, club/league logos or "live" services. Online in-match use limited to 45 images, no video emulation. No use in betting, games or single club/league/player publications. Please contact your account representative for further details.

Football Soccer Britain - Liverpool v West Ham United - Premier League - Anfield - 11/12/16 West Ham United manager Slaven Bilic during the match Reuters / Phil Noble Livepic EDITORIAL USE ONLY. No use with unauthorized audio, video, data, fixture lists, club/league logos or "live" services. Online in-match use limited to 45 images, no video emulation. No use in betting, games or single club/league/player publications. Please contact your account representative for further details.

A student stops to bow to a portrait of Japanese former Emperor Hirohito and Empress Kojun at Tsukamoto kindergarten in Osaka, Japan, November 30, 2016. Picture taken on November 30, 2016. REUTERS/Ha Kwiyeon

Football Soccer - FC Porto v Leicester City - UEFA Champions League Group Stage - Group G - Dragao Stadium, Oporto, Portugal - 7/12/16 FC Porto's Yacine Brahimi Reuters / Miguel Vidal Livepic EDITORIAL USE ONLY.

Football Soccer - FC Porto v Leicester City - UEFA Champions League Group Stage - Group G - Dragao Stadium, Oporto, Portugal - 7/12/16 FC Porto's Yacine Brahimi Reuters / Miguel Vidal Livepic EDITORIAL USE ONLY.

Austrian President-elect Alexander Van der Bellen leaves a news conference in Vienna, Austria, December 6, 2016. REUTERS/Heinz-Peter Bader

Austrian President-elect Alexander Van der Bellen leaves a news conference in Vienna, Austria, December 6, 2016. REUTERS/Heinz-Peter Bader

Austrian President-elect Alexander Van der Bellen leaves a news conference in Vienna, Austria, December 6, 2016. REUTERS/Heinz-Peter Bader

German Chancellor and leader of the conservative Christian Democratic Union party CDU Angela Merkel reacts after her speech at the CDU party convention in Essen, Germany, December 6, 2016. REUTERS/Kai Pfaffenbach

Singapore's President Tony Tan Keng Yam bows to national flags of Singapore (R) and Japan as he reviews the guard of honor during the welcoming ceremony at the Imperial Palace in Tokyo, Japan, November 30, 2016. REUTERS/Kimimasa Mayama/ Pool

Singapore's President Tony Tan Keng Yam (2nd R) bows to the Singapore and Japanese national flags during a welcoming ceremony at the Imperial Palace in Tokyo, Japan, November 30, 2016. REUTERS/Toru Yamanaka/ Pool

Britain Football Soccer - West Bromwich Albion v Burnley - Premier League - The Hawthorns - 21/11/16 Burnley's Stephen Ward reacts after sustaining a head injury Reuters / Darren Staples Livepic EDITORIAL USE ONLY.

Musician Sting arrives on the red carpet for the Bambi 2016 media awards ceremony in Berlin, Germany, November 17, 2016 REUTERS/Fabrizio Bensch

Cricket - India v England - Second Test cricket match - Dr. Y.S. Rajasekhara Reddy ACA-VDCA Cricket Stadium, Visakhapatnam, India - 17/11/16 - India's Cheteshwar Pujara runs between wickets. REUTERS/Danish Siddiqui

U.S. House Republicans bow their heads in prayer before holding closed-door party leadership elections on Capitol Hill in Washington, U.S. November 15, 2016. REUTERS/Jonathan Ernst

A supporter of Democratic presidential nominee Hillary Clinton bows her head at an election night rally in New York, U.S., November 8, 2016. REUTERS/Carlos Barria

Supporters bow their heads in prayer as they gather to rally with Republican U.S. presidential nominee Donald Trump at an arena in Manchester, New Hampshire, U.S. November 7, 2016. REUTERS/Jonathan Ernst

Supporters bow their heads in prayer as they gather to rally with Republican U.S. presidential nominee Donald Trump at an arena in Manchester, New Hampshire, U.S. November 7, 2016. REUTERS/Jonathan Ernst

Japan's Crown Prince Naruhito, center and Crown Princess Masako bow during the funeral service for Prince Mikasa, uncle of the current Emperor Akihito, at the Toshimagaoka cemetery in Tokyo, Japan, November 4, 2016. REUTERS/Koji Sasahara/Pool

South Korean President Park Geun-Hye (L) bows prior to delivering an address to the nation, at the presidential Blue House in Seoul on November 4, 2016. REUTERS/Ed Jones/Pool

South Korean President Park Geun-Hye bows prior to delivering an address to the nation, at the presidential Blue House in Seoul on November 4, 2016.REUTERS/Ed Jones/Pool

Britain Soccer Football - Leicester City v Crystal Palace - Premier League - King Power Stadium - 22/10/16
Leicester City's Ahmed Musa celebrates scoring their first goal
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Football Soccer - Konyaspor v Braga - UEFA Europa League Group Stage - Group H - Metropolitan Stadium, Konya, Turkey - 20/10/16. BragaÕs Ahmed Hassan celebrates their first goal against Konyaspor. REUTERS/Murad Sezer

Britain Football Soccer - Manchester City v Everton - Premier League - Etihad Stadium - 15/10/16
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Fighters from Libyan forces allied with the U.N.-backed government pray in neighbourhood Number Three in Sirte, Libya October 3, 2016. REUTERS/Hani Amara

Britain Soccer Football - Burnley v Arsenal - Premier League - Turf Moor - 2/10/16
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Britain Soccer Football - Burnley v Arsenal - Premier League - Turf Moor - 2/10/16
Arsenal's Alexis Sanchez sustains an injury
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Britain Soccer Football - Burnley v Arsenal - Premier League - Turf Moor - 2/10/16
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Philippines President Rodrigo Duterte (C) reviews a guard of honor with his Vietnamese counterpart Tran Dai Quang (R) during a welcoming ceremony at the Presidential Palace in Hanoi, Vietnam, September 29, 2016. REUTERS/Minh Hoang/Pool

Philippines President Rodrigo Duterte attends a wreath laying ceremony at Monument of National Heroes and Martyrs in Hanoi, Vietnam, September 29, 2016. REUTERS/Minh Hoang/Pool

Football Soccer - Borussia Moenchengladbach v FC Barcelona - UEFA Champions League group stage - Group C - Borussia Park stadium, Moenchengladbach, Germany - 28/09/16 - Barcelona's Neymar reacts REUTERS/Kai Pfaffenbach

Britain Soccer Football - Leicester City v FC Porto - UEFA Champions League Group Stage - Group G - King Power Stadium, Leicester, England - 27/9/16
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Britain Soccer Football - Leicester City v FC Porto - UEFA Champions League Group Stage - Group G - King Power Stadium, Leicester, England - 27/9/16
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South Yorkshire police officers and members of the Greek rescue service (in red uniforms) investigate the ground before commencing excavating a site for Ben Needham, a 21 month old British toddler who went missing in 1991, on the island of Kos, Greece, September 26, 2016. REUTERS/Vassilis Triandafyllou

South Yorkshire police officers and members of the Greek rescue service (in red uniforms) investigate the ground before commencing excavating a site for Ben Needham, a 21 month old British toddler who went missing in 1991, on the island of Kos, Greece, September 26, 2016. REUTERS/Vassilis Triandafyllou

South Yorkshire police officers and members of the Greek rescue service (in red uniforms) investigate the ground before commencing excavating a site for Ben Needham, a 21 month old British toddler who went missing in 1991, on the island of Kos, Greece, September 26, 2016. REUTERS/Vassilis Triandafyllou

South Yorkshire police officers investigate the ground before commencing excavating a site for Ben Needham, a 21 month old British toddler who went missing in 1991, on the island of Kos, Greece, September 26, 2016. REUTERS/Vassilis Triandafyllou

South Yorkshire police officers and members of the Greek rescue service (in red uniforms) investigate the ground before commencing excavating a site for Ben Needham, a 21 month old British toddler who went missing in 1991, on the island of Kos, Greece, September 26, 2016. REUTERS/Vassilis Triandafyllou

Japan's Emperor Akihito bows during a parliament session at the Upper House after declaring the start of the new parliament session in Tokyo, Japan, September 26, 2016. REUTERS/Kim Kyung-Hoon

Four-time Masters champion Arnold Palmer pauses and bows to the gallery as he walks to the 18th green during his final competitive appearance in the Masters golf tournament at Augusta National Golf Club in Augusta, Georgia, U.S. on April 9, 2004. Palmer has competed in the tournament 50 times. REUTERS/Kevin Lamarque/File Photo

Designer Gareth Pugh takes a bow after his catwalk show during London Fashion Week Spring/Summer 2017 in London, Britain September 17, 2016. REUTERS/Neil Hall

A woman bows her head during a prayer as Republican presidential nominee Donald Trump appeared at a campaign event with members of The Remembrance Project, a group formed to honor and remember Americans killed by illegal aliens, in Houston, Texas, U.S., September 17, 2016. REUTERS/Mike Segar

Britain Soccer Football - Aston Villa v Nottingham Forest - Sky Bet Championship - Villa Park - 16/17 - 11/9/16
Nottingham Forest's Vladimir Stojkovic
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Nepalese Muslims attend the mass prayer during the Eid al-Adha celebrations at the Kashmiri Takiya Jame mosque in Kathmandu, Nepal September 13, 2016. REUTERS/Navesh Chitrakar

A boy looks on as Nepalese Muslims attend the mass prayer during the Eid al-Adha celebrations at the Kashmiri Takiya Jame mosque in Kathmandu, Nepal September 13, 2016. REUTERS/Navesh Chitrakar

Women participate in a group prayer session for the Muslim holiday Eid al-Adha in the Brooklyn borough of New York City, U.S., September 12, 2016. REUTERS/Stephanie Keith

People participate in a group prayer session for the Muslim holiday Eid al-Adha in the Brooklyn borough of New York City, U.S., September 12, 2016. REUTERS/Stephanie Keith TPX IMAGES OF THE DAY

Women participate in a group prayer session for the Muslim holiday Eid al-Adha in the Brooklyn borough of New York City, U.S., September 12, 2016. REUTERS/Stephanie Keith

People participate in a group prayer session for the Muslim holiday Eid al-Adha in the Brooklyn borough of New York City, U.S., September 12, 2016. REUTERS/Stephanie Keith