RBC is happy to welcome my old friend Susan Ginsburg as our newest poster. Susan is currently at work on a casebook on homeland security law. In one of her past lives she was chief of staff in the Office of Enforcement at the U.S. Department of the Treasury during the Clinton Administration, from which post she revolutionized gun policy. Since then she has served as a team leader and senior counsel on the 9/11 Commission staff and written two books: Countering Terrorist Mobility and Securing Human Mobility in the Age of Risk, (Migration Policy Institute). After earning a law degree from Penn, Susan clerked for Leon Higgenbotham.