The Gadsden flag -- with its coiled rattlesnake on a bright yellow field and the words 'don't tread on me' -- has symbolic roots stretching back before the American Revolution. Learn its history in this episode of BrainStuff, based on this article: https://history.howstuffworks.com/revolutionary-war/dont-tread-on-me-flag.htmSee omnystudio.com/listener for privacy information.