CentCom Press Briefing NPR's Scott Horsley recaps the news from Iraq. Twelve Americans who were ambushed near Nasiriyah are being held as prisoners of war. Retired Army Maj. Gen. Robert Scales talks about protecting lines of communication on the battlefield. NPR's Guy Raz reports that tension along the Turkish-northern Iraq border. In Berlin, NPR's Emily Harris reports that tens of thousands of people are protesting the war. NPR's David Schaper reports on demonstrations at Wheaton College, a small evangelical Christian school outside of Chicago.