Specialized locking apparatus constructed primarily of metal having a pair of mating locking bars for locking double doors together in a closed configuration during a terrorist lockdown in a school, hospital, or the like so as to block the movement of an active shooter

'activ':43 'apparatus':3 'bar':14 'block':38 'close':22 'configur':23 'construct':4 'door':18 'doubl':17 'hospit':31 'like':34 'lock':2,13,16 'lockdown':27 'mate':12 'metal':7 'movement':40 'pair':10 'primarili':5 'school':30 'shooter':44 'special':1 'terrorist':26 'togeth':19

LIBERTY LOCKDOWN

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