The Rise of ISIS Amid A Year Of Foreign Policy Challenges
A Peshmerga fighter stands beside graffiti of the Islamic State (IS) group flag in Zummar city on December 18, 2014. Kurdish forces continue to battle IS fighters near Syria.
( SAFIN HAMED / Stringer / Getty )
( SAFIN HAMED / Stringer / Getty )
Produced by Mythili Rao
Hosted by Todd Zwillich
