Helios 737

here is an article on the helios crash and the most likely cause. I dont know how credible it is, but from the article it sounds like those guys never should have stepped foot in a cockpit.
http://www.iht.com/articles/2005/09/06/news/crash.php
its 3 pages
http://www.iht.com/articles/2005/09/06/news/crash.php
its 3 pages