Five Decades After Prison Break, Man Who Escaped Alcatraz Sends  FBI A Confession

Tedious and Effective

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Although the chipping process was effective, it was also slow and required a great deal of patience. The inmates had to work quietly to avoid being caught, and they even listened to music at night to cover up the sounds of their work. Frank, in particular, played his accordion to muffle the noise they made while chipping away at the walls.

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