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An honour guard is partially covered by a flag that rolled after a gust of wind at the welcoming ceremony for Netherlands' King Willem-Alexander outside the Great Hall of the People in Beijing, October 26, 2015.

Kim Kyung-Hoon/Reuters

An honour guard is partially covered by a flag that rolled after a gust of wind at the welcoming ceremony for Netherlands’ King Willem-Alexander outside the Great Hall of the People in Beijing, China today.

Supporters of China's President Xi Jinping wait on the Mall for him to pass during his ceremonial welcome, in London, Britain, October 20, 2015. Xi is on a State visit to Britain

Neil Hall/Reuters

Supporters of China’s President Xi Jinping wait on the Mall for him to pass during his ceremonial welcome, in London, Britain on tuesday. Xi is on a State visit to Britain

U.S. President Barack Obama (C) reviews a marsh band during a welcome ceremony at the National Palace in Addis Ababa, Ethiopia July 27, 2015

Tiksa Negeri/Reuters

U.S. President Barack Obama (C) reviews a marsh band during a welcome ceremony at the National Palace in Addis Ababa, Ethiopia today.

President Barack Obama shakes hands and meets Tanzanians during an official arrival ceremony hosted by Tanzania President Jakaya Kikwete and First lady Salma Kikwete in Dar Es Salaam

Gary Cameron/Reuters

US President Barack Obama shakes hands with Tanzanians during an official arrival ceremony hosted by Tanzania President Jakaya Kikwete and First lady Salma Kikwete in Dar Es Salaam.