December 14, 2018 09:54 AM
(NBC News) Harrowing moments were captured on camera Thursday as a backdraft caused a 5-alarm New York City fire to unexpectedly explode.
It happened as firefighters were battling a massive fire at a strip mall in Queens.
Firefighters were knocked off their feet when flames and smoke burst out the front of the building and swept through the entire city block.
Seven firefighters and five civilians were hurt, but all of them are expected to survive.
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Created: December 14, 2018 09:54 AM
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