Pike River Mine Ltd. Chief Executive Peter Whittall attends a morning media briefing on miners missing underground of the Pike River coal mine in Greymouth, New Zealand, Monday, Nov. 22, 2010. Rescue officials on Monday were preparing to send a high-tech robot into a mine tunnel to transmit pictures and assess toxic gas levels three days after an explosion left 29 miners missing underground. At right is police superintendent Gary Knowles. (AP Photo/NZPA, Ross Setford)
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