Rescue operations at the 2.5 km long Tapovan tunnel in Uttarakhand's Chamoli district are still on in full swing. The biggest challenge for rescue teams is removing the slush and debris. Rescuers on Saturday began boring a wider and deeper hole into the tunnel at the flood-ravaged Tapovan-Vishnugad hydel project in an attempt to reach the over 30 people trapped inside for nearly a week after the Uttarakhand glacier break provoking flash floods in the area and trapping several. Watch the video for more information.