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Wife of German President Joachim Gauck, Daniela Schadt (L) and Queen Mathilde of Belgium (C) give flowers 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 (C) give flowers 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)