DENVER - AUGUST 28: Democratic U.S. Presidential nominee Sen. Barack Obama (D-IL) is shown speaking on a screen on day four of DENVER - AUGUST 28: Democratic U.S. Presidential nominee Sen. Barack Obama (D-IL) is shown speaking on a screen on day four of the Democratic National Convention (DNC) at Invesco Field at Mile High August 28, 2008 in Denver, Colorado. U.S. Sen. Barack Obama (D-IL) is the first African-American to be officially nominated as a candidate for U.S. president by a major party. (Photo by Mark Wilson/Getty Images) | |
