Eric Walker added Inside America’s Toughest Federal Prison - The New York Times and United States Penitentiary, Marion - Wikipedia to USP Marion, and added USP Marion to Supermax prisons in the United States and Lockdown penitentiaries

Eric Walker added Pelican Bay State Prison - Wikipedia and Inside America’s Toughest Federal Prison - The New York Times to Pelican Bay State Prison, and added Pelican Bay State Prison to Lockdown penitentiaries

Eric Walker added 1989 Pelican Bay State Prison and 1963 USP Marion to Lockdown penitentiaries, and added Lockdown penitentiaries to Detention and imprisonment

Eric Walker added a number of topics and a number of links to Detention and imprisonment, and added Detention and imprisonment to Crime and law enforcement