America's most feared prison. The nation's worst gangsters, such men as Al Capone, Machine Gun Kelly, and Alvin Karpis have been broken there, and no man has ever escaped from "The Rock." Alcatraz and its impregnable walls, escape-proof, until inmate 1313-0 proved it wasn't!

"AMERICA'S HELLHOLE PRISON - ESCAPE-PROOF UNTIL JOHN GRANT PROVED IT WASN'T!"