'It's like layer upon layer of miracles': How Nepal flood survivors were rescued from tunnel

Tunnelling expert Arnold Dix described how his team managed to reach survivors in a blocked tunnel of the Trishuli 3A Hydropower Station, affected by massive floods. Despite challenges, including locating the tunnel entrance and clearing mud and rocks, rescuers used engineering techniques and explosives to progress. They also had to pump water from the tunnel before creating a passage to rescue the two men found.