Desperate Measures: 'Rat Miners' Lead Rescue Effort for Trapped Indian Tunnel Workers

Rescue efforts to save 41 construction workers trapped in a collapsed highway tunnel in the Indian Himalayas have been unsuccessful for 16 days. After failed attempts with heavy machinery, rescuers are now resorting to drilling vertically from the top of the hill and manually removing debris using a technique called rat-hole mining. The operation is expected to take at least four more days to reach the trapped men. The Indian government has ordered a safety audit of other tunnels being built by the country's highway authority.