UK Mirror 
March 16, 2018
It is one of Britain’s most secretive sites, remaining shrouded in mystery for more than 100 years.
But this week Porton Down found itself at the centre of one of the biggest diplomatic crises the UK has faced in recent years.
The top secret defence base in Wiltshire was instrumental in helping identify the nerve agent used to poison a former Russian spy in Salisbury.
Sergei Skripal  and his daughter Yulia were poisoned with a weapons grade nerve agent in the city last week, leaving them fighting for their lives in hospital.
And, not only have scientists from the specialist laboratory been at the centre of a clean-up operation following the attack, but its helped identify Russia as the source of the poison.
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