A cable hangs from an activation switch for a set of air-lock doors in a Mosaic Co. potash mine in Colonsay, Saskatchewan, Canada, on Tuesday, March 22, 2011. Photographer: Daniel Acker
A personelle vehicle sits in a tunnel at a Mosaic Co. potash mine in Colonsay, Saskatchewan, Canada, on Tuesday, March 22, 2011. Photographer: Daniel Acker
Production Manager Ken Berg, center, speaks with the driver of a Caterpillar Underground Mining Loader in a Mosaic Co. potash mine in Colonsay, Saskatchewan, Canada, on Tuesday, March 22, 2011. Photographer: Daniel Acker
