1964: Inside Alcatraz's fearsome walls
In 1964 Panorama's Michael Charlton made "the most feared journey in the criminal world" to report from the notorious prison island of Alcatraz.
At the time the prison had been closed for over a year but from 1934 to 1963 it was the most feared penal institution in the US.
"The grim cluster of brown buildings was conceived as an unbreakable quarantine for the gangsters of the prohibition era," said BBC's Charlton.
More than 1600 prisoners passed through its gates, including infamous gangsters Al Capone, Mickey Cohen and George "Machine Gun" Kelly, as well as convicted murderer Robert Stroud, who would later become better known as the 'Birdman of Alcatraz'.
In June 1962, Frank Lee Morris, and brothers Clarence and John Anglin escaped from the prison using spoons and a homemade raft. The three prisoners were never recaptured and it remains unknown whether they succeeded in their escape or died in the attempt.
The following year on 21 March 1963, Alcatraz was closed by the Kennedy administration after it was deemed too expensive to keep running.
"It cost $2m a year to run this super lockup, more for each prisoner that a luxury hotel but it was getting beyond repair. That and its evil reputation for bloodshed and violence finally forced its passing," said Charlton.
Originally broadcast 18 May 1964.