Textbook Case on Contractor Security

This story is unbelievable. A former airplane hijacker from Afghanistan working at Heathrow Airport. Clearly background checks of employees aren't done thoroughly. Scary for anybody flying to London.

Though this applies to IT security, it's still sort of related. Here's some suggestions about how an organization can protect its security when working with outside contractors. The controls are both network and software-based, but still interesting, nonetheless.