One of the most secure prisons ever built, this maximum-security federal penitentiary was located in San Francisco Bay to hold the worst of the worst. If anyone was going to get past the elite prison security, they would find themselves facing a perilous two-mile swim to shore in choppy waters. The prison was considered inescapable, with everyone who tried either being quickly recaptured, or sinking to their death in the water below.
Escapes had a 0% success rate - at least until June 11th, 1962. Here is the story of what unfolded on that mysterious date - day by day.


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