ISIS' surprisingly advanced bureaucracyCNN's Atika Shubert explains how the terrorist group ISIS functions as a state.
Who is Vladimir Putin?Russian President, hunter and sports enthusiast, Vladimir Putin wears many hats. Matthew Chance reports.
Yazidi women forced into slaveryThe CNN Freedom Project looks at the plight of Yazidi women held captive by ISIS.
Why is the Sinai so dangerous?CNN's Fred Pleitgen talks about his experiences in the Sinai Peninsula and ISIS' growing mission in the region.