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  • /Uttarakhand tunnel collapse: 41 workers to be examined medically after they are out of the tunnel

Uttarakhand tunnel collapse: 41 workers to be examined medically after they are out of the tunnel

Veteran tunnelling expert Arnold Dix, a rescuer on this operation, speaks exclusively to wion on what vertical drilling is, why the avalanche debris keeps breaking drills, and how this rescue is endangering the lives of rescuers as well.