'We shall respond,' Biden says after US troops killed in Middle East CNN 0 86 01.30 00:32 https://www.youtube.com/watch?v=EjakIuC-ugc + 118 https://www.youtube.com/feeds/videos.xml?channel_id=UCupvZG-5ko_eiXAup… + 11 'We shall respond,' Biden says after US troops killed in Middle East