This text explains the "Red Scare". Reading the text will help you to understand this unit of the textbook better. There are also some short questions and discussion questions to help you think about this issue.
A playlist of scenes from Invasion of the Body Snatchers (1956):
https://www.youtube.com/watch?v=Ie1iJpS5qn4&list=PLeF7On5iVaTzQL9Mstg9ed-CHd4k5Xu_3