Every day we're learning more about extremist movements and how they're grown. On The Why, Tatevik Aprikyan digs deep into the threat of white supremacy with Mark Greenblatt, host of "Verified: The Next Threat" podcast and Heidi Beirich, to uncover the dangerous global reality of hate groups. ------------------------------------- Newsy is your source for news and analysis covering the top stories from around the world. With persistent curiosity and no agenda, we strive to fuel meaningful conversations by highlighting multiple sides of every story. It’s news with the why. Join our newsletter at http://bit.ly/2q1tepr See more at http://www.newsy.com/ Like Newsy on Facebook: http://www.facebook.com/newsy/ Follow us on Twitter: http://www.twitter.com/newsy