"Jim Macklin" wrote in message
news:utANf.109292$QW2.67315@dukeread08...
It will only be available where the tower controlled areas
abut, or in some established routes where a letter of
agreement between Center and the towers has been signed when
Center gives control to their airspace below a certain
altitude.

http://www.faa.gov/ats/aglzob/Lesson...0Control.ppt#1

What type of file is this, or what program opens this file?
--
Jim in NC