Estela de Carlotto is the leader of the 'Grandmothers of the Plaza de Mayo' activist group
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Adriana Metz Romero is the sister or the recently-identified 'Grandchild No. 140', forcibly taken from his mother in 1977
Nearly five decades after he was born in a dictatorship-era detention center and snatched from his mother, a Buenos Aires man has become the 1…