HM Prison Birmingham was described by one source as the worst prison disturbance in a B category prison in the United Kingdom since the 1990 Strangeways Prison riot. The Birmingham riot caused about £2 million worth of damage.<ref name="bbc21/12/2016">HMP Birmingham riot repairs 'will cost £2m'</ref> This is the third serious incident within under two months, Riots previously happened at Bedford Prison and Lewes Prison and a subsequent riot happened at Swaleside Prison. After the riot inspectors found violence and illegal drug use were still problematic. Some prisoners felt unsafe. Prison wings damaged during the riot were not reopened until April 2017. There was
Attica Prison riot officers and four inmates killed being attributed to the prisoners. "New York Times" writer Fred Ferretti said the rebellion concluded in "mass deaths that four days of taut negotiations had sought to avert". As a result of the riot, a number of changes were made in the New York prison system to satisfy some of the prisoners' demands, reduce tension in the system, and prevent future such rebellions. As of 2018, there has never been another riot of anywhere near the scale of the Attica rebellion in the United States. At approximately 4:20 a.m. on Thursday, September 9, 1971, 5