Arnold Engineering Development Complex Flight Systems Acquisitions Branch Project Manager Ozey Young (from left) and AEDC Propulsion Wind Tunnel Branch Project Manager Rob Merrill show AEDC Executive Director Dr. Douglas Blake the progress to date on an upgrade to the complex’s von Kármán Gas Dynamics Facility Tunnel A flexible nozzle. The upgrade is part of a significant VKF modernization program currently underway and scheduled for initial Return to Service in March 2013. (Air Force photo/Rick Goodfriend)