Defense officials display a part of an air-to-air AMRAAM missile which was allegedly fired by Pakistani Air Force aircraft violating Indian airspace, in New Delhi, India, Thursday, February 28, 2019. Indian Air Vice Marshal R.G.K. Kapoor said parts of the missiles which are carried only on F-16s were recovered within Indian territory. India said it shot down a Pakistani warplane, something Islamabad denied. (Photo by Manish Swarup/AP Photo)





Indian policemen and media person wait for the return of Indian pilot at India Pakistan border at Wagah, 28 kilometers (17.5 miles) from Amritsar, India, Friday, March 1, 2019. Pakistan is preparing to hand over a captured Indian pilot as shelling continued for a third night across the disputed Kashmir border even as the two nuclear-armed neighbors seek to defuse the most serious confrontation in two decades. (Photo by Prabhjot Gill/AP Photo)





U.S. security scan outside the Presidential Palace where U.S. President Donald Trump will visit Wednesday, February 27, 2019, in Hanoi, Vietnam. The second summit between Trump and North Korean leader Kim Jong Un will take place in Hanoi on Feb. 27 and 28. (Photo by Vincent Yu/AP Photo)





President Donald Trump speaks as Sec of State Mike Pompeo looks on during a news conference after a summit with North Korean leader Kim Jong Un, Thursday, February 28, 2019, in Hanoi. (Photo by Evan Vucci/AP Photo)





President Donald Trump meets North Korean leader Kim Jong Un, Thursday, February 28, 2019, in Hanoi. (Photo by Evan Vucci/AP Photo)





Air Force One with President Donald Trump aboard takes off at Nom Bar International Airport in Hanoi, Vietnam, Thursday, February 28, 2019, to travel to Washington. (Photo by Andrew Harnik/AP Photo/Pool)





An injured man is evacuated from the scene where a suicide car bomb exploded targeting a Mogadishu hotel in a business center in Maka Al Mukaram street in Mogadishu, Somalia on February 28, 2019. (Photo by Feisal Omar/Reuters)





Firefighters try to rescue a train driver who is trapped in the train remains during a collision between passenger trains in Rio de Janeiro, Brazil on February 27, 2019. (Photo by Sergio Moraes/Reuters)





Firefighters work to resuscitate the driver of a commuter train that was involved in a collision with another train in Sao Cristovao station, in Rio de Janeiro, Brazil, Wednesday, February 27, 2019. Firefighters worked for over six hours to rescue the train's driver, who was caught under the wreckage. (Photo by Leo Correa/AP Photo)





Policemen stand guard in front of a damaged train inside Ramsis train station in Cairo, Egypt, Wednesday, February 27, 2019. An Egyptian medical official said at least 20 people have been killed and dozens injured after a railcar rammed into a barrier inside the station causing an explosion of the fuel tank and triggering a huge blaze that engulfed that part of the station. The head of the Cairo Railroad Hospital said the death toll is expected to rise further. (Photo by Nariman El-Mofty/AP Photo)





A member of the Kurdish-led Syrian Democratic Forces (SDF) searches a woman after she left the IS group's last holdout of Baghouz, in Syria's northern Deir Ezzor province on February 27, 2019. (Photo by Bülent Kılıç/AFP Photo)





A Chinese paramilitary policeman stands guard while facing the Great Hall of the People, the meeting place of China's national legislature, in Beijing, Friday, March 1, 2019. Thousands of delegates from around China are gathering in Beijing for next week's annual session of the country's rubber-stamp legislature and its advisory body. (Photo by Mark Schiefelbein/AP Photo)





Law enforcement officers detain a man during a rally held by opposition supporters in Almaty, Kazakhstan February 27, 2019. (Photo by Pavel Mikheyev/Reuters)





A man carries a set of used tires into Venezuela, through a blind spot on the border near the Simon Bolivar International Bridge in La Parada, Colombia, Thursday, February 28, 2019. The tires were bought in Cucuta, Colombia and carried across the border into Venezuela. (Photo by Martin Mejia/AP Photo)





Flash floods caused by torrential rain go down a street on the outskirts of Jerusalem on February 28, 2019. (Photo by Ahmad Gharabli/AFP Photo)





A resident and his dog navigate through a flooded neighborhood on February 28, 2019 in Guerneville, California. The Russian River has crested over flood stage and is now receding after floodwaters inundate the town of Guerneville. The town is currently under mandatory evacuation and roads leading into the town have been flooded over. (Photo by Justin Sullivan/Getty Images)





Members of the opening committee prepare for the traditional Opera Ball in Vienna, Austria, February 28, 2019. (Photo by Leonhard Foeger/Reuters)





Dancers of the Wiener Staatsballett (state ballet) perform during a dress rehearsal for the traditional Opera Ball in Vienna, Austria on February 27, 2019. (Photo by Leonhard Foeger/Reuters)





Carnivalists with balloons stand in front of the cathedral. Weiberfastnacht traditionally heralds the beginning of street carnival in orth Rhine-Westphalia, Köln on February 28, 2019. (Photo by Oliver Berg/dpa)





Thousands of revelers dressed in carnival costumes celebrate the start of the street carnival in Cologne, Germany, Thursday, February 28, 2019. (Photo by Martin Meissner/AP Photo)





Carnival revelers perform during the Academicos do Baixo Augustaa carnival “bloco” parade in Sao Paulo, Brazil, Sunday, February 24, 2019. (Photo by Andre Penner/AP Photo)





A reveler in costume laughs during the “Cordao do Boitata” street party in Rio de Janeiro, Brazil, Sunday, February 24, 2019, one of the many parades before the official start of Carnival on March 1. (Photo by Leo Correa/AP Photo)





Candidate Ana Maria Gonzalez presents the “La Bruja Blanca” (The White Witch) during the gala to chose the Queen of Tenerife's Carnival held at Santa Cruz de Tenerife in Canary Islands, Spain, 27 February 2019. (Photo by Cristóbal García/EPA/EFE)





A seller of paintings smokes next to his wares at the Arbat street in central Moscow, Russia, 26 February 2019. (Photo by Yuri Kochetkov/EPA/EFE)





A woman sits in a super bloom of poppies in Lake Elsinore, California, U.S., February 27, 2019. (Photo by Lucy Nicholson/Reuters)