While almost every building incorporates elements that
keep its occupants,contents and the built asset itself safe,
some buildings take security to the extreme.
From underground military bunkers and goldreserves
to historic and rarely accessed religious archives,
these are the world’s most secure buildings.
and constructed with granite
Built adjacent to the Cheyenne Mountain Air Force Base and
at a depth of 610 metres below ground,
the Cheyenne Mountain Complex in Colorado
acted as the centre for NORAD and
the United States Space Command,
monitoring North American Airspace
for Soviet missiles and aircraft throughout the Cold War.
Consisting of a labyrinth of tunnels and
15 buildings mounted on shock absorbing springs,
the facility is capable of withstanding and
remaining operational in the event of a 30-megaton nuclear blast and
is protected by a series of 25-tonne steel blast doors.
While the end of the Cold War saw NORAD and
Space Command operations move from the facility,
the complex still operates as an air forcetraining station
and as a back-up strategic command centre.
Though most national archives are available to the public,
the same can not be said of the Papal Archives,
located within the walls of the Vatican City in Rome.
Home to more than 1200 years of historical documents and texts,
the archives were completely off-limits to anyone
outside the inner circle of the Catholic Church prior to 1881.
While limited access can now be requested,
the process to gain entry is amongst the strictest anywhere in the world.
Journalists students and amateur historians are forbidden from entering
and credentials are only granted to academic scholars,
who must renew their access requests every six months.
When permission is granted,
scholars enter the Vatican through a designated entry point
which is protected by the Swiss Guard and are escorted into the archives
where they can view up to three pre-requested documents each day.
While personal computers are allowed into the archives,
photography of the material is forbidden.
Since being opened to scholars,
only a handful of photographs of the more than 80 kilometres
of archive shelving have ever been taken.
The United States Bullion Depository at Fort Knox
is perhaps one of the world’s most famous secure buildings.
Often referred to as “ Fort Knox ” –
due to the building’s location adjacent to the
Fort Knox military base and its fortress-like appearance,
the facility holds large portions
of the United States gold reserves and is heavily guarded
at all times by the United States Mint Police.
Surrounded by a series of fences
and constructed with granite walls
the vault is protected by a 20- tonne blast proof security door
that requires passcode unique to each member of the depository staff.
While the facility doesn’t hold as much gold as the Federal Reserve Bank of New York,
access to the depository is muchmore heavily restricted.
While daily tours operate in the Federal Reserve facility,
Fort Knox has only allowed extrtnal visiters
from outside the treasury department onto the premises twice since its completion
– once in 1974 and again in 2017.
As our world becomes ever more reliant on online services
internet service providers are going to great lengths to secure theirsystems.
Nowhere is this more apparent
than at the underground data centre
operated by Swedish internet provider Bahnhof.
Built 30 metres beneath a granite mountain,
the facility originally operated as a Cold War bunker and
was designed to offer protection
from a nuclear war between Soviet and Western forces.
With servers located deep within the mountain
and only accessible via a single tunnel
protected by a 70-centimeter thick steel door,
the data centre is capable of surviving the blast of hydrogen bomb
and can operate independently at the national grid
thanks to two submarine engines that act as back-up generators.
While the facility is considered to be one
of the most secure data centres in the world
due to its subterranean location,
它模拟日光 喷泉 温室和海水鱼缸的工作环境
its working environment is made more welcoming for employees
with simulated daylight, fountains, greenhousesand a saltwater fish tank.
Perhaps one of the most recognisable buildings in the world,
The White House in Washington D.C. employs a number of
sophisticated measures in order to protect the President
of the United States and their administration.
While visitors are able to tour parts of the White House complex,
All booking must be made in advance with
at least 21 days notice to allow time for background checks.
US citizens must request access through their member of Congress,
while international visitors are advised to contact their embassies.
The White House complex lies at the centre
of a highly restricted, 15-mile flight restricted zone
surrounding Ronald Regan Washington NationalAirport.
A number of surface-to-air missile
launchers are also positioned across the city,
ready to intercept any aircraft that do not comply with direction from the US Air Force.
On the building itself,
roof-mounted radar closely monitors the area around the White House.
the perimeter of the White House is monitored by an array of infrared
cameras able to detect the slightest temperature change
and alert security to any potential threats.
While most of the White Houses defences operate hidden from public view, the White House fence,
surrounding the entire premises is
an imposing piece of fortification in itself.
Standing 2.1 metres (seven feet) tall atopcrash resistant concrete footings,
the wrought iron fence is topped with a series of spikes to deter climbers.
In 2017, plans were approved
to increase the height of the fence to 3.3 metres
and for the fence to be fitted with sensors that alert security personnel
when pressure is applied to the bars.
In addition the buildings bullet-proof windows are capable
of resisting multiple direct impacts from semi-automatic weapons.
Below ground, the Presidential Emergency OperationCenter (or PEOC) located under the East Wing
and the Situation Room, located located under the West Wing
are facilities able to continue operation
even in the event of a nuclear blast.
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