Update to US airspace data available on WTX

US airspace data for the charting cycle effective 20 November has been
published, and is now available at the Special Use Airspace section of
the Worldwide Soaring Turnpoint Exchange.

This update includes a correction to the error involving the Luke AFB
Class D airspace reported by Ted (Tuno) in September, as well as the
routine updates. I surmise that there was an incorrect link in the
shapefile database to the Class E (Sfc) area that is enclosed within
the Luke Class D. That has now been fixed.

Lynn