White House senior adviser Ivanka Trump walks through a terminal before boarding a commercial flight from Dulles International Airport, in Sterling, Va., Saturday April 13, 2019, en route to Ethiopia. Trump will travel to Ethiopia and Ivory Coast to promote a global economical program for women. (Photo by Jacquelyn Martin/AP Photo)





This handout photograph obtained courtesy of Stratolaunch shows the Stratolaunch plane flying over the California desert, April 13, 2019, the first test flight of the US company's gigantic aircraft whose wingspan is almost half that of an Airbus A380. The world's largest airplane – a Stratolaunch behemoth with two fuselages and six Boeing 747 engines – made its first test flight on Saturday, April 13, 2019 in California. The strange aircraft, built by the legendary aeronautical engineering company Scaled Composites in the Mojave Desert, has two fuselages and is powered by six Boeing 747 engines. It must theoretically be used to carry and drop at altitude a small rocket that will then light its engine, and will propel to space to place satellites in orbit. This is a more flexible method of accessing the space than vertical rocket takeoffs, as a large take-off runway would suffice. (Photo by Stratolaunch Systems Corp/AFP Photo/Handout)





Stratolaunch, a giant six-engine aircraft with the world’s longest wingspan , makes its historic first flight from the Mojave Air and Space Port in Mojave, Calif., Saturday, April 13, 2019. Founded by the late billionaire Paul G. Allen, Stratolaunch is vying to be a contender in the market for air-launching small satellites. (Photo by Matt Hartman/AP Photo)





Dominican divers help to recover the wreckage of a car during the search for a rental car presumed to have crashed with U.S. citizens Portia Ravanelle and Orlando Moore, who were due to return to the U.S. on March 27, in Santo Domingo, Dominican Republic April 12, 2019. (Photo by Ricardo Rojas/Reuters)





A view of the crash site of a domestic Summit Air aircraft and a helicopter at Lukla Airport, Solukhumbu district, Nepal, 14 April 2019. At least two people died and five were injured in the accident between a plane and a parked helicopter after take-off, according to media reports. (Photo by Ram Nepal/EPA/EFE)





A view of the crash site of a domestic Summit Air aircraft and a helicopter at Lukla Airport, Solukhumbu district, Nepal, 14 April 2019. (Photo by Xinhua News Agency/Rex Features/Shutterstock)





A view of the crash site of a domestic Summit Air aircraft and a helicopter at Lukla Airport, Solukhumbu district, Nepal, 14 April 2019. (Photo by Ram Nepal/EPA/EFE)





A protester gestures as he holds a flare in front of a police formation during an anti-government rally in Tirana, Albania, Saturday, April 13, 2019. Albanian opposition parties have gathered supporters calling for the government's resignation and an early parliamentary election. (Photo by Visar Kryeziu/AP Photo)





A woman wears a sticker reading “One in Five Million” in Serbian Latin letters, the slogan of protests against populist Serbian president Aleksandar Vucic, in Belgrade, Serbia, Saturday, April 13, 2019. Thousands of people protested against Serbia’s populist President Aleksandar Vucic on Saturday as riot police deployed inside the country’s parliament, saying they wanted to prevent the opposition from storming the building. (Photo by Marko Drobnjakovic/AP Photo)





A female basque pro independence demonstrator is detained by riot policeman as Santiago Abascal, leader of Spanish far right party Vox, holds a meeting during a General Election campaign, in Bilbao, northern Spain, Saturday, April 13, 2019. Spain's political parties are set to launch two-week campaigns leading up to an April 28 election. (Photo by Alvaro Barrientos/AP Photo)





A Samburu woman holds a placard during the Global March for Elephants, Rhinos, Lions and other endangered species (GMFER) to raise awareness and demand governments take action to stop the poaching of elephants and rhinos and protect endangered wildlife in Nairobi, Kenya, on April 13, 2019. (Photo by Yasuyoshi Chiba/AFP Photo)





A man belonging to a caravan of migrants from Honduras en route to the United States, sleeps in a forest by a highway in Tuxtla Chico, Mexico, April 12, 2019. A group of 350 Central American migrants forced their way into Mexico Friday, authorities said, as a new caravan of around 2,500 people arrived – news sure to draw the attention of US President Donald Trump. Mexico's National Migration Institute said some members of the caravan had a “hostile attitude” and had attacked local police in the southern town of Metapa de Dominguez after crossing the border from Guatemala. (Photo by Jose Cabezas/Reuters)





Members of the Presidential Regiment take part in the Changing of the Guard ceremony in the Kremlin, Moscow, Russia on April 13, 2019. (Photo by Maxim Shemetov/Reuters)





Models present creations by Ghanaian designer Aphia Sakyi during the African Fashion International (AFI) Cape Town Fashion Week, in Cape Town, South Africa, 13 April 2019. The event runs from 11 to 13 April. (Photo by Nic Bothma/EPA/EFE)





A visitor attends the fashion show of Belarussian designer Tatyana Efremova during the Belarus Fashion Week in Minsk, Belarus, 13 April 2019. (Photo by Tatyana Zenkovich/EPA/EFE)





Foreign tourists join the Songkran Festival, the celebrations on Thai traditional New Year, also known as the water festival on the popular tourist strip of Khao San road, in Bangkok, Thailand, 13 April 2019. Songkran Festival is held to mark the Thai traditional New Year falling annually on 13 April, and it is celebrated thoughout the Kingdom with splashing water and putting powder on each others faces as a symbolic sign of cleansing and washing away the sins from the past year. (Photo by Narong Sangnak/EPA/EFE)





A sanitary worker sprays pesticide to kill ticks carrying encephalitis at the Royev Ruchey Flora and Fauna amusement park in Taiga district near Krasnoyarsk, Russia April 11, 2019. (Photo by Ilya Naymushin/Reuters)





A vape enthusiast vapes during Vape Jam 2019 at ExCel on April 12, 2019 in London, England. Vape Jam UK, the premier Electronic Cigarette and E-Liquid trade show brings key industry players, leading manufacturers, consumers, hobbyists and people looking for an alternative to tobacco. (Photo by Corbishley/Alamy Live News)





People in swimwear skiing and snowboarding down a slope during the Grelka Fest-2019 Festival at the Sheregesh ski resort, Kemerovo Region, Russia on April 13, 2019. (Photo by Kirill Kukhmar/TASS)





Skiers and snowboarders in swimwear during the Grelka Fest-2019 Festival at the Sheregesh ski resort, Kemerovo Region, Russia on April 13, 2019. (Photo by Kirill Kukhmar/TASS)





Skiers and snowboarders in swimwear during the Grelka Fest-2019 Festival at the Sheregesh ski resort, Kemerovo Region, Russia on April 13, 2019. (Photo by Kirill Kukhmar/TASS)





A young girl in a bikini top lying on a snowboard during the Grelka Fest-2019 Festival at the Sheregesh ski resort, Kemerovo Region, Russia on April 13, 2019. (Photo by Kirill Kukhmar/TASS)