A revelatory look inside the worlds most dangerous terrorist group. Initially dismissed by US President Barack Obama, along with other fledgling terrorist groups, as a jayvee squad compared to al-Qaeda, the Islamic State of Iraq and Syria ISIS has shocked the world by conquering massive territories in both countries and promising to create a vast new Muslim caliphate that observes the strict dictates of Sharia law. In ISIS Inside the Army of Terror, American journalist Michael Weiss and Syrian analyst Hassan Hassan explain how these violent extremists evolved from a nearly defeated Iraqi insurgent group into a jihadi army of international volunteers who behead Western hostages in slickly produced videos and have conquered territory equal to the size of Great Britain.