A police officer directs traffic in the rain as a dignitary's motorcade passes through an intersection in central Beijing, China, Friday, June 17, 2016. Although Beijing is in a semi-dry climate, it receives much of its annual precipitation during the summer months. (AP Photo/Mark Schiefelbein)

Mark Schiefelbein/AP

A police officer directs traffic in the rain as a dignitary’s motorcade passes through an intersection in central Beijing, China 

People hold placards as they protest against the presence of US bases, in front of the gate of the US Marine Corps' Camp Schwab in Nago on the southern island of Okinawa prefecture on June 17, 2016. Okinawan

Toru Yamanaka/AFP/Getty

People hold placards as they protest against the presence of US bases, in front of the gate of the US Marine Corps’ Camp Schwab in Nago on the southern island of Okinawa prefecture, Japan

A man arrives to lay floweres at a statu...A man arrives to lay floweres at a statue to Joseph Priestly in Birstall, northern England, on June 17, 2016, near to the scene where Labour MP Jo Cox was shot yesterday. Jo Cox, the British lawmaker murdered on the streets of northern England on June 16, had complained to police earlier this year about "malicious communications" she received, police said Friday. / AFP PHOTO / OLI SCARFFOLI SCARFF/AFP/Getty Images

Oli Scarff/AFP/Getty

A man arrives to lay flower at a statue to Joseph Priestly in Birstall, northern England near to the scene where Labour MP Jo Cox was shot on Thursday 

Palestinians are checked by guards at the Israeli Qalandia checkpoint as Muslim worshippers make their way to attend the second Friday prayer of the holy fasting month of Ramadan in Jerusalem's al-Aqsa mosque compound, on June 17, 2016 near the West Bank city of Ramallah.  / AFP PHOTO / ABBAS MOMANIABBAS MOMANI/AFP/Getty Images

Abbas Momani/AFP/Getty

Palestinians are checked by guards at the Israeli Qalandia checkpoint as Muslim worshippers make their way to attend the second Friday prayer of the holy fasting month of Ramadan in Jerusalem

A view from the installation 'The Floating Piers' by Bulgarian-born artist Christo Vladimirov Yavachev known as Christo, on the Lake Iseo, northern Italy, June 16, 2016.REUTERS/Stefano Rellandini

Stefano Rellandini/Reuters

A view from the installation ‘The Floating Piers’ by Bulgarian-born artist Christo Vladimirov Yavachev known as Christo, on the Lake Iseo, northern Italy 

U.S. Secretary of State John Kerry (R) and Danish Foreign Minister Kristian Jensen look on as a breakdancer performs during a tour of GAME, an organization that promotes youth sports, in Copenhagen, Denmark June 17, 2016. REUTERS/Evan Vucci/Pool

Evan Vucci/Reuters

U.S. Secretary of State John Kerry and Danish Foreign Minister Kristian Jensen look on as a breakdancer performs during a tour of GAME, an organization that promotes youth sports, in Copenhagen, Denmark

Belgian Ian Frejean, 11, walks with "Zora" the robot, a humanoid robot designed to entertain patients and to support care providers, at AZ Damiaan hospital in Ostend, Belgium June 16, 2016. REUTERS/Francois Lenoir

Francois Lenoir/Reuters

Belgian Ian Frejean, 11, walks with “Zora” the robot, a humanoid robot designed to entertain patients and to support care providers, at AZ Damiaan hospital in Ostend, Belgium

A police forensic photographer works at the scene outside the library in Birstall where Labour MP Jo Cox was shot on June 16, 2016. Campaigning for Britain's EU referendum next week was suspended on Thursday following news a leading MP with the "Remain" camp was in a critical condition after being shot. Jo Cox, a 41-year-old mother-of-two from the opposition Labour Party, was left bleeding on the pavement after the incident in the town of Birstall in northern England, according to witnesses quoted by local media.  / AFP PHOTO / OLI SCARFFOLI SCARFF/AFP/Getty Images

Oli Scarff/AFP/Getty

A police forensic photographer works at the scene outside the library in Birstall where Labour MP Jo Cox was shot. Campaigning for Britain’s EU referendum next week was suspended on Thursday following news a leading MP with the “Remain” camp was in a critical condition after being shot.

Wales supporter cheer during the Euro 2016 Group B soccer match between England and Wales at the Bollaert stadium in Lens, France, Thursday, June 16, 2016. (AP Photo/Michel Spingler)

Michel Spingler/AP

Welsh supporters cheer during the Euro 2016 Group B soccer match between England and Wales at the Bollaert stadium in Lens, France 

Britain Horse Racing - Royal Ascot - Ascot Racecourse - 16/6/16 Ladies Day Racegoer wears hat Reuters / Andrew Boyers

Andrew Boyers/Reuters

A Racegoer wears a flower inspired hat at Ladies Day, Royal Ascot 

epa05368863 Matthias Mueller, CEO of Volkswagen AG, attends a press conference at the Volkswagen plant in Wolfsburg, Germany, 16 June 2016. The German carmaker Volkswagen (VW) introduced its strategy until the year of 2025.  EPA/JULIAN STRATENSCHULTE

Julian Stratenschulte/EPA

Matthias Mueller, CEO of Volkswagen AG, attends a press conference at the Volkswagen plant in Wolfsburg, Germany

(FILES) This handout photo realeased by the European Southern Observatory and taken on June 7, 2016 shows deep in the heart of the Abell 2597 Brightest Cluster Galaxy, a small cluster of giant gas clouds raining in on the central black hole.  First postulated more than 230 years ago, black holes have been extensively researched, frequently depicted, even featured in films. But here's the thing we're still not sure they even exist. On a quest for proof, scientists have trained a massive telescope in Chile on a point some 24,000 lightyears away, where a supermassive black hole is thought to lurk. / AFP PHOTO / European Southern Observatory / STRSTR/AFP/Getty Images

European Southern Observatory/STR/AFP/Getty

Abell 2597 Brightest Cluster Galaxy is seen, a small cluster of giant gas clouds raining in on the central black hole. First postulated more than 230 years ago, black holes have been extensively researched 

Boris Johnson MP chats with Basil Burgess (right) as he visits Sam Cole Foods fish processing factory in Lowestoft, Suffolk, where he was campaigning on behalf of the Vote Leave EU campaign. PRESS ASSOCIATION Photo. Picture date: Thursday June 16, 2016. See PA story POLITICS EU. Photo credit should read: Stefan Rousseau/PA Wire

Stefan Rousseau/PA

Boris Johnson MP chats with Basil Burgess as he visits Sam Cole Foods fish processing factory in Lowestoft, Suffolk, where he was campaigning on behalf of the Vote Leave EU campaign

Taiwanese honour guards stand during a ceremony to mark the 92nd anniversary of the Whampoa Military Academy, in Kaohsiung, southern Taiwan June 16, 2016. REUTERS/Tyrone Siu     TPX IMAGES OF THE DAY

Tyrone Siu/Reuters

Taiwanese honour guards stand during a ceremony to mark the 92nd anniversary of the Whampoa Military Academy, in Kaohsiung, southern Taiwan 

A Swiss fan waits for the start of the Euro 2016 Group A soccer match between Romania and Switzerland at the Parc des Princes stadium in Paris, France

Christophe Ena/AP

A Swiss fan waits for the start of the Euro 2016 Group A soccer match between Romania and Switzerland at the Parc des Princes stadium in Paris, France

Newly ordained Buddhist monks pray during a ceremony of Upasampada, Buddhist rite of higher ordination, by which a novice becomes a monk, or bhikhu at a Buddhist temple in Colombo, Sri Lanka June 15, 2016. REUTERS/Dinuka Liyanawatte

Dinuka Liyanawatte/Reuters

Newly ordained Buddhist monks pray during a ceremony of Upasampada, Buddhist rite of higher ordination, by which a novice becomes a monk, or bhikhu at a Buddhist temple in Colombo 

epa05366292 Indian protesters ring bell and shout slogans during protest demonstration in Jammu, the winter capital of Kashmir, India, 15 June 2016. According to the news reports, mobile internet services were suspended in all 10 districts of Jammu region after the protests against the desecration of an ancient temple of Lord Shiva by youth of the other community whom was blamed for smashing the window panes and doors of a temple.  EPA/JAIPAL SINGH

Jaipal Singh/EPA

Indian protesters ring bells and shout slogans during a protest demonstration in Jammu, the winter capital of Kashmir, India. According to news reports, mobile internet services were suspended in all 10 districts of Jammu region after protests against the desecration of an ancient temple of Lord Shiva 

A boat carrying supporters for the Remain in the EU campaign including Sir Bob Geldoff (C) shout and wave at Brexit fishing boats as they sail up the river Thames in central London on June 15, 2016. A Brexit flotilla of fishing boats sailed up the River Thames into London today with foghorns sounding, in a protest against EU fishing quotas by the campaign for Britain to leave the European Union. / AFP PHOTO / BEN STANSALLBEN STANSALL/AFP/Getty Images

Ben Stansall/AFP/Getty

A boat carrying supporters for the Remain in the EU campaign including Sir Bob Geldoff shout and wave at Brexit fishing boats as they sail up the river Thames in central London

LONDON, ENGLAND - JUNE 15:  Nigel Farage, leader of the UK Independence Party shows his support for the 'Leave' campaign for the upcoming EU Referendum aboard a boat on the River Thames on June 15, 2016 in London, England.  Nigel Farage, leader of UKIP, is campaigning for the United Kingdom to leave the European Union in a referendum being held on June 23, 2016.  (Photo by Jeff Spicer

Jeff Spicer/Getty

Nigel Farage, leader of the UK Independence Party shows his support for the ‘Leave’ campaign for the upcoming EU Referendum aboard a boat on the River Thames. Nigel Farage, leader of UKIP, is campaigning for the United Kingdom to leave the European Union in a referendum being held on June 23 

A girl looks around displays at the world premiere of 'Meet Vincent van Gogh' exhibition in Beijing, China, June 15, 2016

Kim Kyung-Hoon/Reuters

A girl looks around displays at the world premiere of ‘Meet Vincent van Gogh’ exhibition in Beijing, China today