One of the great ecumenists of the 20th --and early 21st-- century has died very suddenly. I just learned this from the Catholic Theological Society of America mailing list. It is so soon after his death that there are no obituaries yet. But because of his role at the Second Vatican Council (he was a peritus, an official theological expert, appointed by Pope John XXIII) and his wide-ranging scholarly and ecumenical work, there is a substantial biography, with photos, bibliography, and other information, here.
May the angels sing him to paradise. Rest in peace, brother George, and rise in glory.