This document provides an overview of terrorism in the United States from the 1950s to the early 2000s. It discusses various left-wing and right-wing terrorist groups that operated during this time period, including the Weather Underground, Symbionese Liberation Army, Black Liberation Army, FALN, Ku Klux Klan, and neo-Nazi groups. It also summarizes some major terrorist attacks that occurred in the US, such as the 1993 World Trade Center bombing and the 9/11 attacks. The document examines both domestic and international terrorism threats during this era of post-World War II political violence in America.