- New research reveals ISIS government structure in parts of Syria and Iraq
- Abu Bakr al-Baghdadi, a former U.S. inmate in Iraq, is leader of so-called "Islamic State"
- TRAC research shows ISIS' evolution from military force to basic services provider
- Many ISIS officials, including key deputies, are Saddam Hussein-era military officers
(CNN)Put yourself in the shoes (and seventh-century black robes) of ISIS' Abu Bakr al-Baghdadi, the mysterious boss of the terror group that is striking fear into the hearts of leaders around the world.