7500 is the aircraft transponder code used to indicate a hijacking.
Most modern aircraft - especially those on intercontinental routes - have crew break rooms or "rest areas" aboard, where the crew can get some sleep on long flights, which is perfect for hiding something like a dead body, away from the passengers.
Originally had an August 31st 2012 release.
The background of the start menu has clouds that, if you look closely, resemble screaming faces
Was originally titled Flight 75.