http://news.bbc.co.uk/2/hi/uk_news/3498199.stm

Which one's the odd one out?

Cheyenne Mountain - the command, control, communication and intelligence centre for coordinating and controlling North American Aerospace Defence Command and US Space Command missions
HavenCo - a data-protection company based six miles off Britain, at Sealand in the North Sea, to which all but authorised staff, investors and members of the Royal Family are denied access
ADX-Florence Prison - a maximum security jail in Colorado, US, where electronic doors, cameras and audio equipment allow a single guard to control the movements of numerous prisoners in several cell blocks
Deposed Iraqi leader Saddam Hussein's Baghdad bunker - a shelter where occupants could survive a direct hit from an atomic bomb for six months
The Mormon Church records store - vaults encased in rock at Granite Mountains, Utah, US, where armed guards waving metal detector wands usher visitors into a concrete bunker before swinging open metal gates to a tunnel entrance
Fort Knox - a bank vault with a 25-tonne (24.6-ton) door
The 1960s Bar - part of the Burlington bunker in Wiltshire
Air Force One - a modified Boeing aircraft with all the latest safety technology, which flies the US President around the world
Area 51 - a US military facility about 90 miles north of Las Vegas
Bold Lane - a multi-storey car park near the shopping centre in Derby