Chile's 33 miners rescue shaft

The 2010 Copiapó mining accident, also known then as the "Chilean mining accident", began on 5 August 2010, with a cave-in at the San José copper–gold mine, located in the Atacama Desert 45 kilometers north of the regional capital of Copiapó, in northern Chile. Thirty-three men, trapped 700 meters underground and 5 kilometers from the mine's entrance via spiraling underground ramps, were rescued after 69 days.After the state-owned mining company, Codelco, took over rescue efforts from the mine's owners, exploratory boreholes were drilled. Seventeen days after the accident, a note was found taped to a drill bit pulled back to the surface: "Estamos bien en el refugio los 33".

Three separate drilling rig teams, nearly every Chilean government ministry, the United States's space agency, NASA, and a dozen corporations from around the world cooperated in completing the rescue.

Source: Wikipedia