When Hall disappeared in 1994, cell phone triangulation and other technologies commonly used in missing person cases today weren't available.

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The breakout effort was detected around 4:35 a.m. local time on Friday, when a juvenile hall counselor saw a sledgehammer striking the window of Wade's cell, said Michael Daly, who runs the facility.

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But Hall says that auditing a supply chain for conflict minerals would only increase the price of a cell phone, for example, by a penny.

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