The 1st of September marks the 70th anniversary of the signing of the ANZUS Treaty. Since then, it's been the cornerstone of Australia's most important security relationship, but is it time to rethink how we approach our alliance with the United States? On this episode of ABC Saturday Extra's A Foreign Affair guests include Susannah Patton, a Research Fellow in the Foreign Policy and Defence Program at the United States Studies Centre; Paul Kelly, Editor-at-large, The Australian; and James Curran, Professor of Modern History at Sydney University and foreign affairs columnist for the Australian Financial Review.