Marine Liam Madden, of Boston, is escorted by two Denver poice officers to meet with a member of Barack Obama's staff, after he and hundreds of marchers from several groups spearheaded by Tent State University Protest march towards the Pepsi Center on the Auraria Campus in Denver Wednesday in the Democratic National Convention. The group was demanding that one person from a group of Iraq Veterans Against the War meet with the Democratic nominee, Barack Obama, to hear their demands of immediate withdrawl of troops from Iraq.