Unfriendly Skies

http://www.sxc.hu/photo/378534

Due to widespread fear of the number 13, Memphis International Airport does not have a gate numbered A13, B13, or C13; Long Island MacArthur Airport does not have a Gate 13; and Birmingham (Ala.) International Airport does not have a Gate C13.

For the same reason, there has never been an F-13 fighter aircraft in the United States.