A devastating ambush in Iraq, kidnapped soldiers, and the men who wouldn't leave their comrades behind The 10th Mountain Division is known as the most deployed unit in the U.S. Army. Today, the War on Terror has drawn it to Afghanistan and Iraq. To Lieutenant Colonel Mike Infanti's unit fell the pacification of a hellish hotbed of terrorism south of Baghdad dubbed "The Triangle of Death." Of the more than three thousand Americans killed since the start of the war, more than one thousand were in this region. Colonel Infanti assigned Delta Company to the most dangerous sector of the Triangle. Delta knew they were virtually assured of getting hit on a daily basis. Each day and night became something to be dreaded and feared. In the predawn of May 12, 2007, two humvees occupied by seven soldiers and an Iraqi translator were ambushed by insurgents. When the smoke cleared, four soldiers and the translator were dead and three were missing, presumably seized by the enemy. For more than a year, Delta searched for their missing comrades, never giving up hope. Their creed of battle: None Left Behind.