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(L-R) Queen Mathilde of Belgium, US President Donald Trump, King Philippe - Filip of Belgium and US First Lady Melania Trump stand during a reception at the Royal Palace in Brussels, on May 24, 2017. / AFP PHOTO / THIERRY CHARLIER (Photo credit should read THIERRY CHARLIER/AFP/Getty Images)

(L-R) Queen Mathilde of Belgium, US President Donald Trump, King Philippe - Filip of Belgium  and US First Lady Melania Trump stand during a reception at the Royal Palace in Brussels, on May 24, 2017. / AFP PHOTO / THIERRY CHARLIER        (Photo credit should read THIERRY CHARLIER/AFP/Getty Images)

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TOPSHOT - (L-R) Queen Mathilde of Belgium, US President Donald Trump, King Philippe - Filip of Belgium (R) and US First Lady Melania Trump stand during a reception at the Royal Palace in Brussels, on May 24, 2017. / AFP PHOTO / THIERRY CHARLIER (Photo credit should read THIERRY CHARLIER/AFP/Getty Images)

TOPSHOT - (L-R) Queen Mathilde of Belgium, US President Donald Trump, King Philippe - Filip of Belgium (R) and US First Lady Melania Trump stand during a reception at the Royal Palace in Brussels, on May 24, 2017. / AFP PHOTO / THIERRY CHARLIER        (Photo credit should read THIERRY CHARLIER/AFP/Getty Images)

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US President Donald Trump (front-L) speaks with King Philippe - Filip of Belgium (Front-C) as US First Laday Melania Trump (back-C) walks with Queen Mathilde of Belgium (back-R) during a reception at the Royal Palace in Brussels, on May 24, 2017. Trump is on a two day visit to Belgium, to attend a NATO (North Atlantic Treaty Organization) summit on May 25, 2017. / AFP PHOTO / BELGA / BENOIT DOPPAGNE / Belgium OUT (Photo credit should read BENOIT DOPPAGNE/AFP/Getty Images)

US President Donald Trump (front-L) speaks with King Philippe - Filip of Belgium (Front-C) as US First Laday Melania Trump (back-C) walks with Queen Mathilde of Belgium (back-R) during a reception at the Royal Palace in Brussels, on May 24, 2017. 



Trump is on a two day visit to Belgium, to attend a NATO (North Atlantic Treaty Organization) summit on May 25, 2017.  / AFP PHOTO / BELGA / BENOIT DOPPAGNE / Belgium OUT        (Photo credit should read BENOIT DOPPAGNE/AFP/Getty Images)

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(L-R) Queen Mathilde of Belgium, US President Donald Trump, King Philippe - Filip of Belgium (R) and US First Lady Melania Trump stand during a reception at the Royal Palace in Brussels, on May 24, 2017. / AFP PHOTO / THIERRY CHARLIER (Photo credit should read THIERRY CHARLIER/AFP/Getty Images)

(L-R) Queen Mathilde of Belgium, US President Donald Trump, King Philippe - Filip of Belgium (R) and US First Lady Melania Trump stand during a reception at the Royal Palace in Brussels, on May 24, 2017. / AFP PHOTO / THIERRY CHARLIER        (Photo credit should read THIERRY CHARLIER/AFP/Getty Images)