Uttarkashi Tunnel Rescue, Arnold Dix, Uttarakhand Tunnel News: Softly, Softly... : How Tunnelling Expert Arnold Dix Rescued 41 Workers

The "softly, softly" approach to drilling escape holes was key to freeing the 41 men trapped beneath the collapsed Silkyara tunnel in Uttarakhand, tunnelling expert Arnold Dix told NDTV Wednesday.

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