In this Thursday, June 21, 2018 file photo Britain's Foreign Secretary Boris Johnson talks to a British armed forces serviceman based in Orzysz, in northeastern Poland, during a ceremony at the Tomb of the Unknown Soldier and following talks on security with his Polish counterpart Jacek Czaputowicz in Warsaw, Poland. Boris Johnson aspires to be a modern-day Winston Churchill. Critics fear he's a British Donald Trump. Johnson won the contest to lead the governing Conservative Party on Tuesday July 23, 2019, and is set to be asked Wednesday by Queen Elizabeth II to become Britain's next prime minister. (Photo by Czarek Sokolowski/AP Photo/File)





This photo provided on Thursday, July 25, 2019, by the Planetary Society shows a portion of the LightSail2 spacecraft, top, and part of Earth, centered on Baja California, Mexico. It was one of the photos transmitted from The Planetary Society's LightSail 2 spacecraft, confirming the successful deployment of its solar sail. (Photo by Planetary Society via AP Photo)





Russia's President Vladimir Putin dives to the bottom of the Gulf of Finland in Leningrad Region, Russia on July 27, 2019 aboard a C-Explorer 3.11 submersible to explore the Shchuka-class submarine Shch-308 sunken during World War II. (Photo by Alamy Live News)





Italian astronaut Luca Parmitano, member of the main crew of the expedition to the International Space Station (ISS), gestures, prior to the launch of Soyuz MS-13 space ship at the Russian leased Baikonur cosmodrome, Kazakhstan, Saturday, July 20, 2019. (Photo by Dmitri Lovetsky/AP Photo)





People celebrate after Gov. Ricardo Rossello announced that he is resigning Aug. 2 after weeks of protests over leaked obscene, misogynistic online chats, in San Juan, Puerto Rico, Thursday, July 25, 2019. (Photo by Carlos Giusti/AP Photo)





Italian Member of the European Parliament Silvio Berlusconi attends a voting session to elect the new president of the European Parliament during the first plenary session of the newly elected European Assembly in Strasbourg, France, July 3, 2019. (Photo by Vincent Kessler/Reuters)





A woman holds a rooster inside the high court (Tribunal de Grande Instance) on July 4, 2019, where the justice is set to rule on whether a lively cockerel should be considered a neighbourly nuisance in a case that has led to shreiks of protest in the countryside. (Photo by Xavier Leoty/AFP Photo)





Rep. Alexandria Ocasio-Cortez (D-NY) listens as David Marcus, CEO of Facebook’s Calibra, testifies to the House Financial Services Committee hearing on “Examining Facebook's Proposed Cryptocurrency and Its Impact on Consumers, Investors, and the American Financial System” on Capitol Hill in Washington, U.S., July 17, 2019. (Photo by Joshua Roberts/Reuters)





Member of the Guardia di Finanza alpine rescue looks on as Mount Etna, Europe's highest and most active volcano, erupts in Sicily, Italy, July 27, 2019. (Photo by Antonio Parrinello/Reuters)





Femen activists hold placards during a rally against women violence in Paris, Saturday, July 6, 2019. France has registered more than 70 such alleged killings so far his year, according to a Facebook group tracking them. The current government has promised to accelerate measures to protect abused women. Placards read, left, “state is guilty”, right, “stop to femicide”. (Photo by Michel Euler/AP Photo)





Russian opposition candidate Russian and activist Ilya Yashin, center, gestures while speaking to a crowd next to a bas-relief of the Soviet founder Vladimir Lenin, left, during a protest in Moscow, Russia, Sunday, July 14, 2019. Opposition candidates who run for seats in the city legislature in September's elections have complained that authorities try to bar them from the race by questioning the validity of signatures of city residents they must collect in order to qualify for the race. (Photo by Pavel Golovkin/AP Photo)





A man takes a quiet moment before the start of a march to protest against police violence during previous demonstrations, at Chater Garden, in central Hong Kong, China on July 28, 2019. (Photo by Edgar Su/Reuters)





Demonstrators participate in a march the day after the governor of Puerto Rico, Ricardo Rossello resigned from his charge in San Juan, on July 25, 2019. Puerto Rico's embattled governor announced his resignation late July 24, following two weeks of massive protests triggered by the release of a text exchange in which he and others mocked gay people, women and hurricane victims. “I announce that I will be resigning from the governor's post effective Friday, August 2 at 5 pm”, Rossello said, in a video statement posted on the government's Facebook page. (Photo by Ricardo Arduengo/AFP Photo)





Demonstrator in a costume attends the national strike calling for the resignation of Governor Ricardo Rossello, in San Juan, Puerto Rico on July 22, 2019. (Photo by Gabriella N. Baez/Reuters)





A policeman stands at a pedestrian passage as sheep cross the street during an urban transhumance in Paris on July, 17 2019. The shepherds of Seine-Saint-Denis and their herd begin on July 6, 2019 eleven days of transhumance, from the basilica of Saint-Denis to the center of Paris. (Photo by Martin Bureau/AFP Photo)





Members of the Israeli security forces detain a protester during a demonstration in Tel Aviv on July 3, 2019, against police violence and the recent killing of a young man. Israel braced for a third day of protests after an off-duty police officer killed a young man of Ethiopian origin, as Israeli leaders urged calm amid accusations of racism. In areas throughout the country since July 1, protesters have blocked roads, burned tyres and denounced what they see as discrimination against the Ethiopian-Israeli community. Police say 136 people have been arrested and 111 officers have been wounded, many injured by stones, bottles and petrol bombs thrown at them. (Photo by Ahmad Gharabli/AFP Photo)





A woman reacts during the funeral of Tunisian President Beji Caid Essebsi in Tunis, Tunisia on July 27, 2019. (Photo by Zoubeir Souissi/Reuters)





Peter Sagan of Slovakia and Team Bora-Hansgrohe does a “wheelie” during the individual time trial stage 13 in Pau, France on July 19, 2019. (Photo by Chris Graythen/Getty Images)





Buyan, a male Siberian brown bear, cools down under a stream of water sprayed by an employee in an enclosure on a hot summer day, at the Royev Ruchey zoo in Krasnoyarsk, Russia on June 14, 2019. (Photo by Ilya Naymushin/Reuters)