How Nepal tunnel rescuers managed to find workers trapped in flooded construction site

Rescuers continue to search for hundreds of hydropower workers believed trapped inside tunnels flooded during the August 26 glacial collapse disaster near the China-Nepal border. Two workers were rescued on Friday from the Upper Trishuli 3A hydropower project and a Chinese national was found in another tunnel the following day. Rescuers and family members have recounted the harrowing days leading up to their dramatic rescue.