It took less than a minute for a gunman to shoot his way into the Reina nightclub in Istanbul on New Year's Day.
Security video from outside the nightclub surfaced on social media Sunday, showing the harrowing moments leading up to the New Year's terrorist attack, which killed 39 people and wounded more than 60 others — including an American, a U.S. State Department official told NBC News.
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The gunman remains at large, according to Turkish police.
In the video, the nightclub's bouncer and a few patrons can been seen lingering near the front door as cars glide down the street. Then, suddenly, bullets begin hailing down, ricocheting off the street and a passing car.