That is a picture of Hagia Sophia located in Istanbul, Turkey. The Hagia Sophia served as a center for religious, political, and artistic life for the Byzantine Empire (Eastern Roman Empire). It started as a place of great importance for the Byzantines, but then became a extremely important site of worship when Sultan Mehmed II conquered Constantinople. (Constantinople is modern day Istanbul)
They wouldn't really gain anything from killing, as a matter of fact it would be counter productive since people would gather against them because of it. They want total control over people and they want to break people physically and spiritually. Through torture they would eventually get the person to break and this would be good because they wouldn't be against the state anymore.
Hope my answer helped you :)
<em>The first Presidential inauguration occured in Washington D.C.</em>