What is the truth of the viral video

Due to dense fog, vehicles collided The video which is being shared on social media was scrutinised, and it was found that it is not a recent video. Rather it is a video before five from today. On investigation, it was found that the video was uploaded on a YouTube channel on 8 November 2017. Which belongs to Agra-Noida Yamuna Express. Due to dense fog at that time, vehicles collided simultaneously.

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