It opened on August fifth, the one-year anniversary of the mine collapse.

VOA: special.2011.08.12

Immediately after the mine collapse the men huddled and slept for days in the 50 square meter (500 meter) refuge.

CNN: A day in the life of trapped Chile miners

Chile has held ceremonies to mark the anniversary of the mine collapse that left 33 men trapped for 69 days.

BBC: Chile marks year since mine collapse

The ordeal stirred memories of a 2010 Chilean mine collapse in which 33 men were trapped underground for 69 days.

CNN: Peru: Nine miners rescued after six days underground