AeroMobil display their latest prototype of a flying car, in Monaco, Thursday, April 20, 2017. The light frame plane whose wings can fold back, like an insect is boosted by a rear propeller. The company says it is planning to accept first preorders for the vehicle as soon as later this year. (Photo by Claude Paris/AP Photo)





A beech tree grows through a passenger car in Altenahr, Germany, 19 April 2017. Car expert Peter Schmitz took apart a car and rebuilt it around a beech tree in 80-100 work hours. (Foto by Thomas Frey/DPA)





Swans perform during a media call for the Shanghai Ballet's production of Swan Lake at on April 20, 2017 in Melbourne, Australia. (Photo by Robert Cianflone/Getty Images)





Small leaves of a bush are frost-covered after a cold night in Frankfurt, Germany, Thursday, April 20, 2017. (Photo by Michael Probst/AP Photo)





In this April 15, 2017 photo, Emanuel Balbo is thrown from the stands by other soccer fans during a match between Belgrano and Talleres, in Cordoba, Argentina. Balbo was declared brain dead after he was chased down the terraces of the stadium and thrown from the bleachers. Balbo's father said his son was attacked by a mob after he faced off with a man he blamed for killing his brother. (Photo by Alvaro Martin Corral/AP Photo)





A woman takes a selfie with her smartphone next to a bed of tulip blossoms at a public park in Beijing, Thursday, April 20, 2017. Visitors have been coming to parks in China's capital city in increasing numbers as flowers and trees bloom in an annual rite of spring. (Photo by Mark Schiefelbein/AP Photo)





Kashmiri students chant anti-Indian slogans after an attack by Indian government forces on students, during the fourth consecutive day of protests on April 20, 2017 in Srinagar, the summer capital of Indian administered Kashmir, India. Hundreds of Kashmir students took to the streets to protest a police raid in a college in southern Pulwama town on last week, in which at least 50 students were injured. The students were chanting slogans “Go India, go back” and “We want freedom”. Indian government forces used tear gas to disperse the students , who were protesting against the alleged attack by Indian forces on college students in south Kashmir. The authorities also suspended internet services in the region. (Photo by Yawar Nazir/Getty Images)





Opposition supporters clash with police during protests against unpopular leftist President Nicolas Maduro in San Cristobal, Venezuela April 19, 2017. (Photo by Carlos Eduardo Ramirez/Reuters)





Anti-government protesters launch stones with a sling during clashes in Caracas, Venezuela, Wednesday, April 19, 2017. Tens of thousands of opponents of President Nicolas Maduro flooded the streets of Caracas in what's been dubbed the “mother of all marches” against the embattled socialist president. (Photo by Fernando Llano/AP Photo)





A demonstrator knees in front of riot police during a rally against Venezuela's President Nicolas Maduro in Caracas, Venezuela April 20, 2017. (Photo by Carlos Eduardo Ramirez/Reuters)





In this April 20, 2017 photo, a woman is aided by fellow demonstrators after falling, overcome by tear gas, during anti-government protests in Caracas, Venezuela. Tens of thousands of protesters asking for the resignation of President Nicolas Maduro flooded the streets again, one day after three people were killed and hundreds arrested in the biggest anti-government demonstrations in years. (Photo by Ariana Cubillos/AP Photo)





Opposition supporters clash with riot police while rallying against Venezuela's President Nicolas Maduro in Caracas, Venezuela, April 20, 2017. (Photo by Carlos Eduardo Ramirez/Reuters)





A naked demonstrator remonstrates with riot police during a protest against Venezuelan President Nicolas Maduro, in Caracas on April 20, 2017. Venezuelan riot police fired tear gas Thursday at groups of protesters seeking to oust President Nicolas Maduro, who have vowed new mass marches after a day of deadly unrest. Police in western Caracas broke up scores of opposition protesters trying to join a larger march, though there was no immediate repeat of Wednesday's violent clashes, which left three people dead. (Photo by Juan Barreto/AFP Photo)





The Soyuz-FG rocket booster with Soyuz MS-04 spacecraft carrying a new crew to the International Space Station, ISS, blasts off at the Russian leased Baikonur cosmodrome, Kazakhstan, Thursday, April 20, 2017. The Russian rocket carries U.S. astronaut Jack Fischer and Russian cosmonaut Fyodor Yurchikhin. (Photo by Shamil Zhumatov/Reuters)





The Soyuz MS-04 spacecraft carrying the crew of Jack Fischer of the U.S. and Fyodor Yurchikhin of Russia, blasts off to the International Space Station (ISS) from the launchpad at the Baikonur Cosmodrome, Kazakhstan April 20, 2017. (Photo by Shamil Zhumatov/Reuters)





Palestinians working in Israel cross through Israeli Qalandia checkpoint near the West Bank city of Ramallah April 18, 2017. (Photo by Ammar Awad/Reuters)





A man dressed in a Viking costume blows a horn on a street in central Moscow, Russia April 20, 2017. (Photo by Maxim Shemetov/Reuters)





Men perform for tips on the subway platform in Manhattan, New York, U.S. April 20, 2017. (Photo by Shannon Stapleton/Reuters)





People hold their hands up as they walk towards police officers before being controlled near the site of a shooting at the Champs Elysees in Paris on April 20, 2017. French anti- terror prosecutors said they opened a probe today into the shooting on Paris' s Champs Elysees that killed one police officer and wounded two others. France' s interior ministry said the attacker was killed after opening fire on police in the early evening on the world- famous boulevard. (Photo by Franck Fife/AFP Photo)





Masked police stand on top of their vehicle on the Champs Elysees Avenue after two policemen were killed and another wounded in a shooting incident in Paris, France, April 20, 2017. (Photo by Christian Hartmann/Reuters)





French Police officers react after a shooting in which two police officer were killed along with their attacker and another police officer wounded in a terror attack on the Champs Elysees in Paris, France, 20 April 2017. Three police officers were shot on the avenue boulevard, according to reports with their suspected attacker killed by security forces. (Photo by Ian Langsdon/EPA)





A woman smokes a pipe during a 4/20 rally on Parliament Hill in Ottawa, on Thursday, April 20, 2017. (Photo by Sean Kilpatrick/The Canadian Press via AP Photo)





Police arrest a woman after she handed out free marijuana joints to DC residents on Capitol Hill as part of the 1st Annual Joint Session to mark “4/20” day and promote legalizing marijuana on Capitol Hill in Washington, DC, April 20, 2017. (Photo by Saul Loeb/AFP Photo)





In this Monday, April 17, 2017 photo released by China's Xinhua News Agency, a Long March 7 rocket carrying the Tianzhou 1 is transferred to the launching site in Wenchang, south China's Hainan Province. China is preparing to launch its first unmanned cargo spacecraft on a mission to dock with the country's space station. The Tianzhou 1 was due to blast off at 7:41 p.m. (1141 GMT) Thursday atop a latest-generation Long March 7 rocket from China's newest spacecraft launch site. (Photo by Zeng Tao/Xinhua via AP Photo)





Wang Shiyue (R-in blue) and Liu Xinyu (L) of China skate during their short dance in the ice dance event at the World Team Trophy figure skating competition in Tokyo on April 20, 2017. (Photo by Toru Yamanaka/AFP Photo)





Li Zijun of China performs during the short program for the women' s singles at the World Team Trophy figure skating competition in Tokyo on April 20, 2017. (Photo by Issei Kato/Reuters)





A Sri Lankan worker pulls a cart beside garbage at a dump in Karadiyana, a suburb of Colombo on April 20, 2017, after the city's main landfill closed following a garbage mountain collapse which killed 32 people and destroyed 145 homes. The Colombo municipality obtained permission from court to override protests from local residents and move garbage to Karadiyana as a temporary measure until a permanent solution to Colombos garbage problem is found. (Photo by Ishara S. Kodikara/AFP Photo)





A dog hopes to be rescued in a destroyed area after mudslides caused by heavy rains leading several rivers to overflow, pushing sediment and rocks into buildings and roads, in Manizales, Colombia April 19, 2017. (Photo by Santiago Osorio/Reuters)





A rescue dog searches for bodies in an area destroyed after mudslides caused by heavy rains leading several rivers to overflow, pushing sediment and rocks into buildings and roads, in Manizales, Colombia April 20, 2017. (Photo by Santiago Osorio/Reuters)





A Hezbollah fighter holds an RPG as he takes his position between orange trees, at the coastal border town of Naqoura, south Lebanon, Thursday, April 20, 2017. Hezbollah organized a media tour along the border with Israel meant to provide an insight into defensive measures established by the Israeli forces along the southern frontier in the past year in preparation for any future conflict. (Photo by Hussein Malla/AP Photo)





Women embroider intricate decorations for the royal crematorium for the late Thai King Bhumibol Adulyadej at the Office of Traditional Arts in Nakhon Pathom province, Thailand, Thursday, April 20, 2017. The cremation is planned for late October, 2017. (Photo by Sakchai Lalit/AP Photo)