… Wanke Stephen Zobell A key element of the NextGen traffic management concept is the ability to flexibly and efficiently resolve congestion at tactical timeframes (say, 30 minutes to 2 hours … the express written permission of The MITRE Corporation. For further information, please contact The MITRE Corporation, Contract Office, 7515 Colshire Drive, McLean, VA 22102 (703) … Range and Aerospace Meteorology, 20-24 January 2008, New Orleans, LA <http://ams.confex.com/ams/pdfpapers/132903.pdf> (accessed 21 July 2009), American Meteorological Society, Boston, …