Why were Special Emergency Response teams created?

Prison security is extremely important in order to protect staff and the inmates housed within its walls. Special Emergency Response Teams have been created in order to control dangerous situations involving inmates. Watch the video attached and perform research on Special Emergency Response Teams. Why were these teams created? What are some of the requirements for joining these teams? How can these teams prevent a dangerous situation from escalating out of control? Make sure to cite your sources in order to legitimize your opinion. video link https://www.youtube.com/watch?v=xk_nassbFS0