Don't forget about physical security - Australia

[Sean Donelan <sean () donelan com>]

Two people dressed as computer technicians entered Australia's mainframe
data center for customs and intelligence centre at the Sydney
International Airport.  They impersonated EDS technicians hired to repair
the mainframes.  They spent two hours disconnecting the mainframe
communications equipment.  They then put the equipment on trolleys
and pushed them out the front door past the guards.