Erroll Southers on the Likelihood of Extremist Groups Have Infiltrated Protests - ABC News Australia

More than 40 cities in 20 states are enacting curfews in an effort to quell the unrest that has broken out on the streets. A tense situation is unfolding in Washington DC, near the White House.

Dr. Erroll Southers, Professor of the Practice in National and Homeland Security and Director of Homegrown Violent Extremism Studies at the University of Southern California, spoke to ABC NewsRadio's Tracey Holmes.