It was to be one of the defining moments of World War One. On November the 20th 1917 Britain unleashed its terrifying secret weapon against the enemy - the tank. Andrew Pate reports on its 95th anniversary.
It's 95 years since the first tanks were unleashed by the British Army in the First World War. The soldiers of the 2nd Royal Tank Regiment marked the anniversary on Salisbury Plain. Andrew Pate reports.