And I thought Aerospace Engineering was Difficult

But I'm so glad I'm not a pilot trying to land at these airports:

http://worldaviationjournal.blogspot.com/2008/03/top-10-most-dangerous-aircraft-landings.html

(P.S. If you're bored, log into Google Earth, search one of these places, and then log into the flight simulator (version 4 or later) and try to land at them using the F-16.)