SCIUTTO: Turkey's largest city was rocked today at the heart of an ISIS suicide bomber, and at least eight Germans were among the 10 people killed at the blast at a popular tourist area in Istanbul. The Turkish government says that the attacker was from Syria. A few moments ago, the White House released a statement saying, in part, quote, "The heinous attack occurred in Istanbul's historic heart and struck Turks and foreign tourists alike. We stand together with Turkey, a NATO ally, a strong partner, and a valued member of the counter-ISIL coalition." Our Arwa Damon is live in Istanbul. And so, Arwa, at this point, do we know the direct link to ISIS of the Obama, inspired, directed, but also came across the border from Syria into Turkey?</s>ARWA DAMON, CNN SENIOR INTERNATIONAL CORRESPONDENT: This is what we know at this stage according to the senior government officials here, Jim, and that is that this individual was, as you were saying there, of Syrian origin born in 1988 and according to Turkish officials came across the border from Syria into Turkey only recently. This is not someone that the Turks had been tracking for a while, because they do have quite a number of individuals that they keep under constant surveillance. Many are saying that this points to, first of all, how difficult it is to control that border, and how difficult it is to keep track of everyone who is coming across, bearing in mind, that this is a country home to almost two million refugees, and also, the more internal security challenges that the country is facing. We are just outside of the police cordon where the attack took place, and this is a strike that is not only sending a message to Turkey, but because the suicide bomber went after a soft target, because foreign nationals were killed, it is sending a message that reverberates far beyond this country's borders -- Jim?</s>SCIUTTO: Thank you, Arwa Damon, from Istanbul. Still ahead, he is 23 years old, and he has cheated death twice, and helped to save a train full of people from a potential terrorist attack. What could top that? Spencer Stone is going to tell us, himself. That's right after this break.
ISIS Suicide Bomber in Istanbul Kills Germans