Eric Walker added Inside America’s Toughest Federal Prison - The New York Times to a number of topics

Eric Walker added Eastern State Penitentiary - Wikipedia to 1829 Eastern State Penitentiary (ESP)

Eric Walker added Eastern State Penitentiary Historic Site to 1829 Eastern State Penitentiary (ESP)

Eric Walker added 1995 ADX Florence and 1829 Eastern State Penitentiary (ESP) to Separate incarceration, and added Separate incarceration to Solitary confinement and Prison reform

Eric Walker added a number of links to Eastern State Penitentiary (ESP), and added Eastern State Penitentiary (ESP) to Separate incarceration and Philadelphia

Eric Walker added 1829 Eastern State Penitentiary (ESP) and 1787 Constitutional Convention and a number of links to Philadelphia, and added Philadelphia to Cities in Pennsylvania