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Wife of German President Joachim Gauck, Daniela Schadt (L) and Queen Mathilde of Belgium (R) walk as they visit the Child Focus missing children center in Brussels, during a state visit of German President Gauck on March 8, 2016. / AFP / BELGA / BENOIT DOPPAGNE / Belgium OUT (Photo credit should read BENOIT DOPPAGNE/AFP/Getty Images)

Wife of German President Joachim Gauck, Daniela Schadt (L) and Queen Mathilde of Belgium (R) walk as they visit the Child Focus missing children center in Brussels, during a state visit of German President Gauck on March 8, 2016. / AFP / BELGA / BENOIT DOPPAGNE / Belgium OUT        (Photo credit should read BENOIT DOPPAGNE/AFP/Getty Images)