US President Donald Trump and First Lady Melania Trump arrive to pay their respects to former US President George H. W. Bush as he lies in state in the US Capitol's rotunda December 3, 2018 in Washington, DC. - The body of the late former President George H.W. Bush travelled from Houston to Washington, where he will lie in state at the US Capitol through Wednesday morning. Bush, who died on November 30, will return to Houston for his funeral on Thursday. (AFP)

US President Donald Trump and First Lady Melania Trump arrive to pay their respects to former US President George H. W. Bush as he lies in state in the US Capitol's rotunda December 3, 2018 in Washington, DC. - The body of the late former President George H.W. Bush travelled from Houston to Washington, where he will lie in state at the US Capitol through Wednesday morning. Bush, who died on November 30, will return to Houston for his funeral on Thursday. (AFP)

Former US President George W. Bush looks up at Vice President Mike Pence as he walks back to his seat past Bush and his wife former first lady Laura Bush after Pence spoke about the president's father former President George H.W. Bush during ceremonies in the US Capitol Rotunda on December 3, 2018 in Washington, DC. - The body of the late former President George H.W. Bush travelled from Houston to Washington, where he will lie in state at the US Capitol through Wednesday morning. Bush, who died on November 30, will return to Houston for his funeral on Thursday. (AFP)

Nearly 150 Central American migrants seeking political asylum in the United States are detained by the Border Patrol, after entering the US through the Rio Grande, along the border with Ciudad Juarez, Chihuahua state, Mexico, on December 3, 2018. - Thousands of Central American migrants, mostly Hondurans, have trekked for over a month in the hopes of reaching the United States. (AFP)

US President Donald Trump and First Lady Melania Trump walk by a statue of former President Andrew Jackson as they arrive to pay their respects to former president George H.W. Bush as he lies in State at the U.S. Capitol Rotunda on Capitol Hill on December 3, 2018 in Washington, DC. - The body of the late former President George H.W. Bush travelled from Houston to Washington, where he will lie in state at the US Capitol through Wednesday morning. Bush, who died on November 30, will return to Houston for his funeral on Thursday. (AFP)

Former president George W. Bush, wife Laura Bush, and brother Jeb Bush stand before the flag-draped casket of former president George H.W. Bush at the US Capitol Rotunda on Capitol Hill on Monday, December 3, 2018 in Washington, DC. (AFP)

A demonstrator walks near a burning car during a protest of Yellow vests (Gilets jaunes) against rising oil prices and living costs, on December 1, 2018 in Paris. (AFP)

A statue of Abraham Lincoln, the 16th President of the United States, stands inside the Rotunda of the US Capitol, December 3, 2018 in Washington, DC. - The body of the late former President George H.W. Bush will travel from Houston to Washington, where he will lie in state at the US Capitol through Wednesday morning. Bush, who died on November 30, will return to Houston for his funeral on Thursday. (AFP)

A man rides a bicycle in a park amid the smog covering Sofia as air pollution reaches "very unhealthy" level in Bulgarian capital on December 3, 2018. (AFP)

Chinese Cosco Shipping Rose container ship sails the newly inaugurated Cocoli locks, during the visit of China's President Xi Jinping, in the Panama Canal, on December 3, 2018. - Chinese President Xi Jinping is on an official visit to Panama after attending the G20 Summit in Argentina. (AFP)

A Soyuz MS-11 rocket carrying Russian, American and Canadian astronauts takes off from the Baikonur Cosmodrome on December 3, 2018 before reached orbit later, the first manned mission since a failed launch in October. (AFP)

Central American migrants who have been travelling in a caravan hoping to get to the United States, climb the metal barrier separating Mexico and the US to cross from Playas de Tijuana in Mexico into the United States, on December 2, 2018. - Thousands of Central American migrants, mostly Hondurans, have trekked for over a month in the hopes of reaching the United States. (AFP)

Marine Commandos (MARCOS) of the Indian Navy take part in a simulated hostage rescue operation at the Gateway of India during a rehearsal for forthcoming Navy Day celebrations in Mumbai on December 2, 2018. (AFP)

A high school student clashes with a riot police officer during a demonstration against French government Education reforms on December 3, 2018 in Bordeaux, southwestern France. (AFP)

Indian labourers construct a temporary road on the banks of the Sangam for the upcoming Kumbh Mela festival, in Allahabad on December 3, 2018. - The Kumbh Mela in the town of Allahabad will see millions of Hindu devotees gather from January 15 to March 4, 2019 to take a ritual bath in the holy waters, believed to cleanse sins and bestow blessings. ( AFP)