Democrat convention opens with praises

The wife of US Democratic presidential hopeful Barack Obama has joined party leaders in praising his values, dedication to family and leadership.



Michelle Obama, who gave the first keynote address of the party\'s four-day convention in Denver, said he would make an extraordinary president.



Senator Edward Kennedy, who is undergoing treatment for brain cancer, also lauded Mr. Obama, saying he offered new hope.



House Speaker Nancy Pelosi spoke of a defining moment in the history for the US.



Mr. Obama is the first African-American to be nominated as a US presidential candidate and will stand against Republican John McCain in the November 4 ballot.