Class A airspace: http://www.youtube.com/watch?v=MZvoqTPBb5A Class B Airspace: http://www.youtube.com/watch?v=ZjihDFqTrNI Class C Airspace: http://www.youtube.com/watch?v=V3L2OSGrVLk http://www.youtube.com/watch?v=uG9Hrd8AGNw Class D: http://www.youtube.com/watch?v=U_oqGPUuYeo Class E and G: http://www.youtube.com/watch?v=4Y6AHvQjpO4 Visibility and cloud clearance in airspaces: http://www.youtube.com/watch?v=RswjKlwn3tU&list=UU2-CN3DZ13jevL5VodtGcCA