There is no way to improve on the way This Day in Music wrote up this item:

2007, 1,730 guitarists played the immortal Bob Dylan classic, ‘Knocking On Heaven’s Door’ in a bid to break a record in the state of Meghalaya, North East India. The guitarists hoped their achievement would earn them a place in the Guinness Book of World Records. The current Guinness World Record was held by a guitar-ensemble from Kansas City in the US when 1,683 guitarists, played Deep Purple’s ‘Smoke On The Water’.

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