It was a war to oust a dictator. And the United States Marines led the way. For 30 days, National Geographic producer Gary Scurka rode in the company of ground troops in Iraq, all the way from Kuwait to Baghdad. He presents a Marine's-eye view of the war, revealing the personal stories of a group of 21st century warriors as they push north toward Baghdad. For more than 350 miles, life and death intertwined. Some died along the way, but all of them made history. These are their stories: The Devil Dog Diaries.