washington, d.c., the headlines this hour -- barack obama has won a second term as president of united states. he promised the next four years will be better than the last. >> our road has been hard, our journey has been long, and we are kicking ourselves up and fighting our way back. we know in our hearts that for the united states of america, the best is yet to come. [applause] >> his challenger, mitt romney, but -- conceded defeat. many of the key battleground states went to the democrats. >> i just called the president to congratulate him on his victory. his supporters in the campaign also deserve congratulations. i wish them well, particularly the president, the first lady, and their daughters. >> world leaders have been offering congratulations to