A train carrying North Korean leader Kim Jong-un arrives at Dong Dang Railway Station, to start his visit to Vietnam ahead of the US-North Korea summit hosted in Hanoi, at Dong Dang town, Lang Son province, Vietnam, 26 February 2019. The second meeting of the US President and the North Korean leader, running from 27 to 28 February 2019, focuses on furthering steps towards achieving peace and complete denuclearization of the Korean peninsula. (Photo by EPA/EFE/Stringer)





People wave Vietnam flags as a motorcade carrying North Korean leader Kim Jong Un is driven to Hanoi, Vietnam, Tuesday, February 26, 2019. (Photo by Gemunu Amarasinghe/AP Photo)





North Korean leader Kim Jong Un waves from a car after arriving by train in Dong Dang in Vietnamese border town Tuesday, February 26, 2019, ahead of his second summit with U.S. President Donald Trump. (Photo by Minh Hoang/AP Photo)





North Korean bodyguards run along a limousine transporting Kim Jong Un upon his arrival in Dong Dang, Vietnam, February 26, 2019. (Photo by Reuters/Stringer)





Motorists pass by army vehicles outside the Melia Hotel where North Korea leader Kim Jong Un is expected to stay at, in Hanoi, Vietnam, Tuesday, February 26, 2019. Kim arrived in Dong Dang, Vietnamese border town ahead of his second summit with U.S.President Donald Trump. (Photo by Vincent Yu/AP Photo)





Vietnamese security stand outside the entrance to Dong Dang train station where North Korean leader Kim Jong Un is expected to arrive at the border town with China, in Dong Dang, Vietnam, Monday, February 25, 2019. With North Korean leader Kim Jong Un on an armored train barreling through China toward Vietnam's capital, and U.S. President Donald Trump about to board a jet for Hanoi, Vietnamese officials scrambled Monday to finish preparations for a rushed summit that will capture global attention. (Photo by Minh Hoang/AP Photo)





A slow shutter image shows North Korean bodyguards in the motorcade following their leader Kim Jong-un as he makes his way from in Dong Dang to Hanoi ahead of the second US-North Korea summit, Vietnam, 26 February 2019. The second meeting of the US President and the North Korean leader, running from 27 to 28 February 2019, focuses on furthering steps towards achieving peace and complete denuclearization of the Korean peninsula. (Photo by Wallace Woon/EPA/EFE)





Riot policeman wear gas masks and carry a tear gas grenade launcher, but did not fire, during a celebratory gathering of supporters of President Muhammadu Buhari anticipating victory, in Kano, northern Nigeria Monday, February 25, 2019. Nigeria's electoral commission on Monday began announcing official results from the country's 36 states as President Muhammadu Buhari seeks a second term. (Photo by Ben Curtis/AP Photo)





Supporters of the ruling party and main opposition party briefly pull knives and machetes on each other during an otherwise celebratory gathering of supporters of President Muhammadu Buhari anticipating victory, in Kano, northern Nigeria Monday, February 25, 2019. (Photo by Ben Curtis/AP Photo)





A mounted policeman rides his horse as he patrols outside the electoral commission offices in Kano, northern Nigeria Monday, February 25, 2019. (Photo by Ben Curtis/AP Photo)





A youth, right, who was injured in clashes with Venezuelan National Guardsmen, who are blocking the entry of U.S.-supplied humanitarian aid on the Simon Bolivar International Bridge, is carried by medics to a safe zone in La Parada, Colombia, Monday, February 25, 2019, on the border with Venezuela. The delivery of humanitarian aid to the economically devastated nation has faltered amid strong resistance from security forces who remain loyal to Venezuelan President Nicolas Maduro. (Photo by Fernando Vergara/AP Photo)





Supporters of outgoing president Macky Sall celebrate in advance their candidate's victory at the Senegal's presidential elections on February 24, 2019 in Dakar. Macky Sall, a stolid 56-year-old ex-geologist who challenged his former mentor to become president, won in the first round of the election on February 24, his prime minister said, although his two main challengers look set to contest the outcome. (Photo by Michele Cattani/AFP Photo)





A French Republican Guard waits for a guest to arrive, on the steps of the Elysee Palace in Paris, France, February 25, 2019. (Photo by Philippe Wojazer/Reuters)





A reveller takes part in an annual block party known as “Academicos do Baixa Augusta” (Academics of Baixa Augusta neighbourhood), during carnival festivities in Sao Paulo, Brazil, February 24, 2019. (Photo by Nacho Doce/Reuters)





South Korean climber Woonseon Shin reaches for her next hold during her second place climb in the 2019 UIAA Ice Climbing World Cup finals on February 24, 2019 in Denver, Colorado. (Photo by Michael Ciaglo/Getty Images)





A woman relaxes in the daffodils during sunny spring weather in St James's Park in central London, Britain, 25 February 2019. Reports state that 25 February 2019 is the hottest recorded February day in Britain since records began. It is the first time a temperature of over 20 Celsius (Centigrade) has been recorded in winter. (Photo by Vickie Flores/EPA/EFE)