福克斯新闻 白宫证实ISIS斩首事件录像带的真实性（在线收听）

President Obama says Americans will not be intimidated by the horrific beheading of Steven Sotloff.

At a news conference in Estonia, he said the nation's objective is clear — and that is to degrade and destroy the Islamist State. Short of that, he said the goal is to shrink the group's…

(President Obama)"Sphere of influence, its effectiveness, its financing…its…its military capabilities…to the point where it is a manageable problem."

The President emphasized having a regional strategy when it comes to dealing with ISIS.

In Washington, Rachel Sutherland, FOX News Radio.