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Speaking at the Orient-Occident-Unity Conference in Washington on April 20, 1912, 'Abdu'l-Bahá invoked Bahá'u'lláh's image of humanity as *leaves of one tree, drops of one sea,* called America to be the first nation to lay the foundation of international agreement, and thanked the Committee of Union and Progress in Constantinople for the liberation that had made His Western journey possible.