In “United States of Jihad: Investigating America’s Homegrown Terrorists,” CNN national security analyst Peter Bergen takes a look at recent attacks in the United States and follows the stories of some of the terrorists at their roots. 

From the Boston Marathon bombings to more recent attack in San Bernardino, Bergen explores the radicalization of American citizens and how the U.S. might confront that threat. 

Listen to the full interview in the player above.