The recent shooting in Buffalo, New York, which authorities are investigating as a hate crime, has yet again highlighted the threat posed by domestic terrorism in the U.S. At the center are violent extremists – the most lethal and persistent of whom are white supremacists and anti-government militias. They're part of a deeply interconnected movement which, since the 1980s, has pursued a mission to topple the U.S government with guerrilla warfare. Today, this movement is made up of highly-organized groups with paramilitary capabilities, but it hasn't always been this way. This week, we trace the rise of the modern white power movement.