Lockdown - Extreme Prison Gangs

National Geographic brings you firsthand accounts from inmates and correctional officers in a prison where gang leaders have the upper hand and call the shots. At Salinas Valley State Prison in Soledad, California, there are nearly 200 gang-related attacks each year. An estimated 70% of inmates were gang members on the outside and mergers take place to form racial armies. Mass battles take place in the violent C yard, inhabited by leaders who order assaults, riots and murders to be carried out by 'foot soldiers'.