Do or die: Final election day dawns

US President Barack Obama (C) waves on stage with rapper Jay-Z and musician Bruce Springsteen (R) at the end of an election campaign rally in Columbus, Ohio, November 5, 2012, on the eve of the US presidential elections. [Photo/Agencies]  

Republican presidential nominee Mitt Romney greets audience members at a campaign rally at the airport in Lynchburg, Virginia November 5, 2012. [Photo/Agencies]