Denver, Aug 29 : Democratic presidential nominee Barack Obama has said in his acceptance speech that the forthcoming election was a chance for America to keep the promise alive in the 21st century.
Accepting the nomination to run for the President of the US, Obama, in his address at the party's National Convention at Invesco stadium, said: "This moment, this election, is our chance to keep, in the 21st century, the American promise alive."
In front of a crowd of about 75,000 people, Obama promised that he would do his best to keep alive the American dream of opportunity for all. "America, we are better than these last eight years. We are a better country than this," BBC News quoted Obama as saying to cheering crowds.
He also promised to reverse the economic downturn afflicting the US to restore the nation's standing in the world, and to cut taxes for working families and small businesses and end U.S. dependence on Middle Eastern oil in 10 years.
Obama, the first African-American to be nominated by a major US party, used the acceptance speech to tell his countrymen more about himself, while arguing that he is a better candidate to lead the country than presumed Republican nominee John McCain.
Criticising McCain as 'out of touch' with the concerns of ordinary Americans, Obama said McCain had 'failed' to help ordinary Americans on issues such as the economy, health care and education.
Emphasising that he would call for the withdrawal of troops from Iraq, Obama said McCain stood alone in his stubborn refusal to end a misguided war, and adding that "I will restore our moral standing, so that America is once again that last best hope for all who are called to the cause of freedom, who long for lives of peace, who yearn for a better future."
Recalling the message of Martin Luther King, who delivered his "I Have a Dream'' speech 45 years ago to the day, Obama said: "America, we cannot turn back. We cannot walk alone. At this moment, in this election, we must pledge once more to walk into the future."
Before Obama took the stage, former Vice President Al Gore got the crowd roaring by saying that the world would be different if he had won his own race against Bush in 2000. "Now, Obama represents the right course. We must seize this opportunity to elect Barack Obama president of the United States,'' Al Gore added.
Obama's family and running mate Joe Biden joined him on stage. The crowds gave him a standing ovation.
Earlier, Senator Joe Biden has also accepted his own nomination for vice-president.
Republican nominee McCain is set to accept his nomination at the party's National Convention next week in St. Paul, Minnesota. McCain is expected to announce his running mate on Friday.
The US presidential election is scheduled to take place on November 4.