Stephen Flanagan, PhD, senior political scientist at the RAND Corporation think tank, discusses the challenges facing NATO on its 70th anniversary, challenges, as well as Turkey and the alliance with Defense & Aerospace Report Editor Vago Muradian at the NATO Engages: The Alliance at 70 event sponsored by the Atlantic Council, the German Marshall Fund, the Munich Security Conference and other think tanks and organizations to mark NATO’s founding with the signing of the Washington Treaty on April 4, 1949. From those 12 founding nations, 29 nations are now members.