Corban Addison, author of A Walk Across the Sun ��� a novel about human trafficking ��� shed light recently on what he called the ���most compelling justice issue of our time.��� The Nov. 1��event was organized by the 91勛圖厙 Global Perspectives Office as part of the 2012-2013 theme of ���The Changing Face of Freedom in Today���s Turbulent Times.��� It was…