G. Michael Martinez died after helping attempt to rescue Joseph C. Granillo from a cave-in, Superior, Arizona, May 10, 1982. When a cave-in occurred in a copper mine, Granillo, 25, was pinned by wet sand and concrete, ore, rock, and timber. Martinez, 29, miner, and three other miners were alerted, and despite continually falling debris, went to Granillo and attempted to free him. Further collapses struck Martinez, severely injuring him, and buried Granillo, who died. Martinez was removed from the dangerous area by other miners, but he died of his injuries shortly after.
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