What is a Communications Management Unit (CMU)? In 2006 and 2008, the Federal Bureau of Prisons created the Communications Management Units (CMUs), prison units designed to isolate and segregate certain prisoners in the federal prison system. Unlike other prisoners, individuals detained in the CMUs are completely banned from any physical contact with visitors, restricted in interactions with other prisoners, and limited in phone calls with friends and family members.
New discovered photos show the last prisoners depart from Alcatraz Island federal prison in San Francisco. The National Park Service on Thursday celebrated the 50th anniversary of Alcatraz Island's closure with an exhibit of the photos