Read the text and complete the gaps with the words derived from the given ones

The Chilean Mining Accident

On 5th August 2010, two groups of [ ] were digging in a gold-copper mine in San Jose, Chile. Due to a landslide, the tunnel collapsed and the men became trapped. The [ ] men survived 69 days deep underground before their rescue. The old mine had a long record of fines and safety [ ] which had resulted in a series of accidents in the past. As a result, authorities [ ] thought that the workers hadn't survived the collapse. [ ], 17 days after the accident, it was confirmed that the men were alive.

[ ] immediately devised a plan to keep the workers alive during their [ ] and to rescue them from the [ ] of the mine. Without delay, they started drilling a narrow borehole into the cavern where it was possible to send the men food and medical [ ]. Then, they had the precarious task of drilling a hole large enough to carry the men to the surface as the ground was [ ] and vulnerable to collapse.

However, after several failed attempts, they [ ] brought all 33 men to the surface!